chandra sekaran on Sat, 25 Jun 2016 14:54:03 +0200


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Need permutation help for n!/(n-r)!


Hi Bill 

I have not put the question properly.

(18:08) gp > 50!/(50-3)!
%3 = 117600

Out of 117600 ,  some number following permutation will fall. I want to find the number.
[38, 40, 41] , [2,3,5], [10,11,12], [12,11,10]
or Find the three number permutation which will fall on 2000.

If  n grows bigger( say 600! ) fast finding three number set and reverse  is possible?

Thanks


Chandrasekaran B