id:A061703 - OEIS Search Results

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G.f.: 2*x*(2-2*x-3*x^2+2*x^3)/((1-3*x-x^2+x^3)*(1-x)).

+0
3

0, 4, 12, 34, 108, 344, 1104, 3546, 11396, 36628, 117732, 378426, 1216380, 3909832, 12567448, 40395794, 129844996, 417363332, 1341539196, 4312135922, 13860583628, 44552347608, 143205490528, 460308235562, 1479577849604 (list; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`R. P. Stanley, Enumerative Combinatorics I, Example 4.7.17.`
	CROSSREFS	`Row sums of A061702, A000183.` `Sequence in context: A014143 A077994 A077843 this_sequence A126948 A131593 A084362` `Adjacent sequences: A061700 A061701 A061702 this_sequence A061704 A061705 A061706`
	KEYWORD	`easy,nonn`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)Eunet.yu), Jun 18 2001`

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Last modified December 2 15:58 EST 2008. Contains 150992 sequences.

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