id:A027286 - OEIS Search Results

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a(n) = Sum{(k+1)*T(n,k)}, 0<=k<=2n, T given by A026584.

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1, 4, 18, 56, 190, 564, 1722, 4976, 14454, 40940, 115698, 322728, 896558, 2471588, 6786090, 18537184, 50459366, 136844892, 370030434, 997705240, 2683514526, 7201203988, 19284880794, 51546789456, 137541880150, 366412976332 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`G.f.: (3x^2+2x+1)/(1-x-4x^2)^2.`
	CROSSREFS	`Sequence in context: A027659 A059133 A020644 this_sequence A119044 A058851 A073373` `Adjacent sequences: A027283 A027284 A027285 this_sequence A027287 A027288 A027289`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified December 19 21:04 EST 2009. Contains 171054 sequences.

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