id:A003013 - OEIS Search Results

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Expansion of 1+x*exp(x)+x^2*exp(2*x).

+0
3

1, 1, 4, 15, 52, 165, 486, 1351, 3592, 9225, 23050, 56331, 135180, 319501, 745486, 1720335, 3932176, 8912913, 20054034, 44826643, 99614740, 220200981, 484442134, 1061158935, 2315255832, 5033164825 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`a(0) = 1, a(n) = (n^2-n)2^n/4 + n. a(n) = A002999(n) - n = A001815(n) + n. - Ralf Stephan (ralf(AT)ark.in-berlin.de), Sep 02 2003`
	CROSSREFS	`Cf. A048482, A001787, A005183.` `Sequence in context: A055218 A107307 A005492 this_sequence A117202 A137213 A027853` `Adjacent sequences: A003010 A003011 A003012 this_sequence A003014 A003015 A003016`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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