id:A003014 - OEIS Search Results

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Expansion of 1+x*exp(x)+x^2*exp(2*x)+x^3*exp(3*x).

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1, 1, 4, 21, 124, 705, 3726, 18361, 85240, 376641, 1597690, 6551721, 26116740, 101647585, 387634534, 1452554265, 5360857456, 19523426433, 70272302706, 250318462537, 883418329660, 3091835703201, 10739780397214 (list; graph; listen)

	OFFSET	`0,3`
	FORMULA	`n + n(n-1)2^(n-2) + n(n-1)(n-2)3^(n-3). - R. Stephan, Mar 24 2004`
	CROSSREFS	`Sequence in context: A101810 A001888 A103769 this_sequence A108404 A115136 A101478` `Adjacent sequences: A003011 A003012 A003013 this_sequence A003015 A003016 A003017`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research