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Oct 28, 2013 at 21:01 comment added Nathan This vaguely reminds me of the umbral calculus.
S Oct 28, 2013 at 14:56 history suggested Michaël Le Barbier CC BY-SA 3.0
Math notation
Oct 28, 2013 at 14:32 review Suggested edits
S Oct 28, 2013 at 14:56
Oct 28, 2013 at 14:31 answer added Michaël Le Barbier timeline score: 2
Nov 2, 2010 at 13:30 comment added JBL As usual, you have not provided any motivation at all. I've given an answer in terms of trees and/or Stirling numbers below, but it's impossible to know if the problem you started with originally came from this area (in which case my answer just brings you back to where you started, except that perhaps the references in the OEIS will be new).
Nov 2, 2010 at 13:26 answer added JBL timeline score: 2
Nov 2, 2010 at 8:57 history edited Robin Chapman
spurious tag removed
Nov 2, 2010 at 8:16 history edited Anixx CC BY-SA 2.5
added 115 characters in body
Nov 2, 2010 at 8:15 comment added Anixx @ sleepless in beantown, thank you for the advice. Here is the topic (though in Russian): dxdy.ru/topic36602.html
Nov 2, 2010 at 7:49 comment added sleepless in beantown @Annix, that the generating function approach led nowhere would have been an informative point to have included in your original question posting, particularly if you had tried it and failed...
Nov 2, 2010 at 7:43 comment added Anixx @ Robin Chapman I asked this question some time ago on another mathematical forum asking to find a common form for A(n,x). One participant of that forum suggested to use the generating function. But it turned out then that it does not lead to anything useful.
Nov 2, 2010 at 7:22 comment added Robin Chapman Have you looked at the exponential generating function of $A(j,k)$?
Nov 2, 2010 at 6:36 comment added Anixx @Ryan Budney probably, this en.wikipedia.org/wiki/… I just wonder in what circumstances such expansions occur and how one can find the * operation from the given binomial expansion. If it does not relate to abstract algebra, the tag can be removed.
Nov 2, 2010 at 6:23 comment added Ryan Budney What does your question have to do with abstract algebra?
Nov 2, 2010 at 4:45 history asked Anixx CC BY-SA 2.5