id:A027327 - OEIS Search Results

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a(n) = Sum{(k+1)*T(n,m-k)}, 0<=k<=m, where m=0 for n=0,1; m=n for n >= 2; T given by A026120.

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1, 3, 12, 36, 108, 324, 972, 2916, 8748, 26244, 78732, 236196, 708588, 2125764, 6377292, 19131876, 57395628, 172186884, 516560652, 1549681956, 4649045868, 13947137604, 41841412812, 125524238436, 376572715308 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: (1+3x^2)/(1-3x) - Paul Barry (pbarry(AT)wit.ie), May 19 2003`
	CROSSREFS	`Sequence in context: A009787 A135190 A101069 this_sequence A061130 A004661 A074430` `Adjacent sequences: A027324 A027325 A027326 this_sequence A027328 A027329 A027330`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified July 19 08:04 EDT 2008. Contains 142098 sequences.

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