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  2. Combinatorial number system - Wikipedia

    en.wikipedia.org/wiki/Combinatorial_number_system

    The combinations are represented as strictly decreasing sequences c k > ... > c 2 > c 1 ≥ 0 where each c i corresponds to the index of a chosen element in a given k-combination. Distinct numbers correspond to distinct k-combinations, and produce them in lexicographic order. The numbers less than () correspond to all k-combinations of {0, 1 ...

  3. Combination - Wikipedia

    en.wikipedia.org/wiki/Combination

    These combinations (subsets) are enumerated by the 1 digits of the set of base 2 numbers counting from 0 to 2 n − 1, where each digit position is an item from the set of n. Given 3 cards numbered 1 to 3, there are 8 distinct combinations ( subsets ), including the empty set :

  4. Wikipedia:List of all single-letter-single-digit combinations

    en.wikipedia.org/wiki/Wikipedia:List_of_all...

    The list of all single-letter-single-digit combinations contains 520 ... A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A-0 A-1 A-2 A-3 A-4 A-5 A-6 A-7 A-8 A-9 B0 B1 B2 B3 B4 B5 B6 B7 ...

  5. 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.

  6. Wikipedia:List of all single-letter-double-digit combinations

    en.wikipedia.org/wiki/Wikipedia:List_of_all...

    The list of all single-letter-double-digit combinations contains 7,800 elements of the form [[{{letter}}{{digit}}{{digit}}]] and [[{{letter}}-{{digit}}{{digit}}]] and ...

  7. Here are the Powerball lottery numbers most often on winning ...

    www.aol.com/news/powerball-lottery-numbers-most...

    Well, even the number that’s hit the most appears just 2% of the time on jackpot wins. ... appearing in 159 winning combinations, followed by No. 23 (158 combinations) and No. 14 (153).

  8. Bell number - Wikipedia

    en.wikipedia.org/wiki/Bell_number

    If a number is a squarefree positive integer, meaning that it is the product of some number of distinct prime numbers, then gives the number of different multiplicative partitions of . These are factorizations of N {\displaystyle N} into numbers greater than one, treating two factorizations as the same if they have the same factors in a ...

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