Sorry, "typo". The verb and the numbers are correct, but the description is wrong. It should be:
The number of sets of x equal-sized subsets of y objects. (Each subset is of size y%x.) ----- Original Message ----- From: Roger Hui <[EMAIL PROTECTED]> Date: Wednesday, July 23, 2008 22:31 Subject: Re: [Jprogramming] equal-size partitions To: Programming forum <[email protected]> > The number of size-x subsets of y objects > (number of equal sized subsets) is: > > ness=: 4 : 0 " 0 > (!y) % (!x) * (!y%x)^x > ) > > 2x ness 2x*>:i.10 > 1 3 10 35 126 462 1716 6435 24310 92378 > http://www.research.att.com/~njas/sequences/A001700 > > 3x ness 3x*>:i.8 > 1 15 280 5775 126126 2858856 66512160 1577585295 > http://www.research.att.com/~njas/sequences/A060542 > > 4x ness 4x*>:i.8 > 1 105 15400 2627625 488864376 96197645544 19688264481600 > 4148378852099625http://www.research.att.com/~njas/sequences/A082368 ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
