- Verbose.net - http://www.verbose.net/
- Dedicated to the natural order of the universe and to the irrational and logical chaos it presents.
- RJN's More Digits of Irrational Numbers - http://antwrp.gsfc.nasa.gov/htmltest/rjn_dig.html
- Several million digits of e, and the square roots of 2, 3, 5, 6, 7, 8, and 10.
- Mathemagic - http://members.aol.com/loosetooth/math.html
- In praise of the beauty of the numbers pi, e and phi.
- Number Gossip - http://www.tanyakhovanova.com/numbers/
- Numerous special categories of numbers, searchable.
- Mathematical Constants and Computation - http://numbers.computation.free.fr/constants/constants.html
- Essays, references, links, software.
- Arabic numerals - http://www-history.mcs.st-andrews.ac.uk/history/histtopics/arabic_numerals.html
- Describes the history of the Arabic numeral system that is in use nearly all over the world today.
- Indian numerals - http://www-history.mcs.st-andrews.ac.uk/history/histtopics/indian_numerals.html
- Describes the history of the indian numeral system.
- Square root of 2 - http://www.rossi.com/sqr2.htm
- Provides information about the square root of 2, lists the first 1000 digits and provides links to pages with up to 5 million digits. Also contains download links for programming libraries for calculating numbers with high precision or many digits.
- FAQ on Special Numbers - http://www.faqs.org/faqs/sci-math-faq/specialnumbers/
- Answers to Frequently asked questions about special numbers.
- Catalan Number -- MathWorld - http://mathworld.wolfram.com/catalannumber.html
- Illustration of the Catalan numbers related to Euler's polygon division problem.
- Absolutely Abnormal Numbers - http://arxiv.org/abs/math.nt/0006089/
- Published as math.NT/0006089, this note investigates numbers that are normal to no base whatsoever, and writes down explicitly such a number.
- Fun With Numbers - http://www.newdream.net/~sage/old/numbers/
- Includes some lists of numerals, relating to basic operations performed on certain constants. Not updated since 1995.
- Stewy's Site - http://stewy6.tripod.com/infinitesimal.htm
- The infinitesimal is the opposite of infinity, and mathematicians still argue over its existence. This page probes into one of the weirdest numbers in mathematics.
- Triangular Numbers - http://www.shyamsundergupta.com/triangle.htm
- Properties of triangular numbers including reversible, happy, harshad, highly composite, deficient, abundant ones.
- The Golden Pentagon - http://mathpages.com/home/kmath153.htm
- MathPages depiction of tiling a plane using a progression of equilateral triangles dividing a pentagon. Most interesting is that this pentagon is uniquely and recursively divided by triangles, just as is seen in the more common recursive division of the Golden Rectangle.
- Jewish Encyclopedia: Numbers and Numerals - http://www.jewishencyclopedia.com/view.jsp?artid=366&letter=n
- Discusses the uses and symbolism of various numbers in Hebrew literature.
- Ask Dr. Math: History of the Terms Google and Googleplex - http://mathforum.org/library/drmath/view/57575.html
- Explains how these very large numbers (1 followed by a hundred zeroes, and 1 followed by a google of zeroes, respectively) were named. With links to references. From Swarthmore's Dr. Math.
- Vampire Numbers - http://hjem.get2net.dk/jka/math/vampires
- Numbers with a factorization containing the same digits, e.g. 1530 = 30*51.
- World of Numbers - http://www.worldofnumbers.com/
- Includes a collection of randomly gathered numbers, curios, puzzles, palindromes and primes.
- Wikipedia - Mathematical constant - http://en.wikipedia.org/wiki/mathematical_constant
- A list of constants with links to more detailed information.
- Friedmann's S-Numbers - http://www.meden.demon.co.uk/mathematics/s-numbers/s-numbers.html
- These are numbers where an expression can be given using the operations of addition and squaring, using the digits of a number in order, which gives the original number. Algorithms, theorems and results.
- 37 Heaven - http://magliery.com/37/
- Collects information around the number thirty-seven.
- Just Who is Mr. 666? - http://www.eingedi.org/666-2.html
- Uses gematria to calculate the number of the beast, and evaluates what it may mean w/r specific Hebrew words and names in the Bible adding up to 666.
- Inverse Symbolic Calculator - http://oldweb.cecm.sfu.ca/projects/isc/iscmain.html
- A set of programs and specialized tables of mathematical constants dedicated to the identification of real numbers.
- Sum Beastliness - http://web.onetel.com/~amygdala/articles/scimaths/666.html
- Some simple mathematics associated with 666, the Number of the Beast.
- Fibonacci Numbers and the Golden section in Nature - http://www.mcs.surrey.ac.uk/personal/r.knott/fibonacci/fibnat.html
- Puzzles and things to do, for schools, teachers, colleges up to university level students, or just for recreation.
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