id:A094762 - OEIS Search Results

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a(n) = Bell(n+1) - 2^n + 1 + n.

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1, 2, 4, 11, 41, 177, 820, 4020, 20900, 115473, 677557, 4211561, 27640354, 190891144, 1382942176, 10480109395, 82864804285, 682076675105, 5832741942932, 51724157711104, 474869815108196, 4506715736350193, 44152005850890065, 445958869286416705 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`Also a(n) = 2^n + Sum_{m=3..n} binomial(n,m)*(Bell(m)-2).`
	MAPLE	`with(combinat); [seq(bell(n+1)-2^n+n+1, n=0..30)];`
	CROSSREFS	`Cf. A000110, A144646.` `Sequence in context: A012948 A013182 A013170 this_sequence A099934 A067353 A105996` `Adjacent sequences: A094759 A094760 A094761 this_sequence A094763 A094764 A094765`
	KEYWORD	`nonn`
	AUTHOR	`Jean-Yves Tallet (jean-yves.tallet(AT)club-internet.fr) and N. J. A. Sloane (njas(AT)research.att.com), Jan 24 2009`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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