lets say I have a set of 2 numbers (1, and 2). I can arrange this set (including all possible amounts of numbers in the set) into 4 arrangements, 1, 2, 12, and 21.(adsbygoogle = window.adsbygoogle || []).push({});

For the set (1, 2, 3), I can arrange 15 different combinations of numbers contained in the set.

What about a set of 4 numbers? (1, 2, 3, 4)

What about a set of 5 numbers? (1, 2, 3, 4, 5)

Remeber I wish to count all possible combinations available within the set. e.g, 1, 2, 3, 4, 12, 21, 23, 32, 34, 43, 123, 321, 234, 432, 134, 431, .............1234, 1342, 1243, 4231, 4132, .........................

What is the formula for this?

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# Set arrangements

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