How To Calculate Combinations ?
I want to see how much combinations are possible when i got 6 numbers..
 got this numbers 123456
 want to calculate how much combinations of ( 2 ) numbers possible
 want to calculate how much of ( 3 ) numbers possible
 want to calculate how much of ( 4 ) numbers possible
 want to calculate how much of ( 5) numbers possible
 never 2 same numbers together (22) or (223) or (2234) may not be in list
 How can i make the result visible in kind of list ?
I would be nice if somebody knows a good solution..
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