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2. Telephone number (mathematics) - Wikipedia

   en.wikipedia.org/wiki/Telephone_number_(mathematics)

   More precisely, the 2-adic order (the number of factors of two in the prime factorization) of T(4k) and of T(4k + 1) is k; for T(4k + 2) it is k + 1, and for T(4k + 3) it is k + 2. [14] For any prime number p , one can test whether there exists a telephone number divisible by p by computing the recurrence for the sequence of telephone numbers ...

3. Zazzle - Wikipedia

   en.wikipedia.org/wiki/Zazzle

   Zazzle. Zazzle is an American online marketplace that allows designers and customers to create their own products with independent manufacturers (clothing, posters, etc.), as well as use images from participating companies. Zazzle has partnered with many brands to amass a collection of digital images from companies like Disney, Warner Brothers ...

4. 11 (number) - Wikipedia

   en.wikipedia.org/wiki/11_(number)

   [7] 11 is a sexy prime with 5 and 17. 11 is the first prime exponent that does not yield a Mersenne prime, where =, which is composite. 11 is also the fifth Heegner number, meaning that the ring of integers of the field has the property of unique factorization and class number 1. 11 is the first prime repunit in decimal (and simply, the first ...

5. Symbolab - Wikipedia

   en.wikipedia.org/wiki/Symbolab

   Symbolab is an answer engine [1] that provides step-by-step solutions to mathematical problems in a range of subjects. [2] It was originally developed by Israeli start-up company EqsQuest Ltd., under whom it was released for public use in 2011. In 2020, the company was acquired by American educational technology website Course Hero. [3] [4]

6. Contact AOL customer support - AOL Help

   help.aol.com/articles/account-management...

   Call live aol support at. 1-800-358-4860. Get live expert help with your AOL needs—from email and passwords, technical questions, mobile email and more.

7. Catalan number - Wikipedia

   en.wikipedia.org/wiki/Catalan_number

   The only Catalan numbers Cn that are odd are those for which n = 2k − 1; all others are even. The only prime Catalan numbers are C2 = 2 and C3 = 5. [1] The Catalan numbers have the integral representations [2] [3] which immediately yields . This has a simple probabilistic interpretation.

8. List of numbers - Wikipedia, the free encyclopedia

   en.wikipedia.org/wiki/List_of_numbers

   A list of articles about numbers (not about numerals). Topics include powers of ten, notable integers, prime and cardinal numbers, and the myriad system.

9. Glossary of mathematical symbols - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_mathematical...

   A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...