id:A027261 - OEIS Search Results

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a(n) = Sum{(k+1)*T(n,k)}, 0<=k<=2n, T given by A025177.

+0
5

1, 6, 18, 72, 270, 972, 3402, 11664, 39366, 131220, 433026, 1417176, 4605822, 14880348, 47829690, 153055008, 487862838, 1549681956, 4907326194, 15496819560, 48814981614, 153418513644, 481176247338 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`2(n+1)*3^(n-1), for n>1 (conjectured). - Ralf Stephan, Feb 02 2004.`
	CROSSREFS	`Cf. A014915, A064017, A079272.` `Cf. A006234.` `Sequence in context: A129369 A095853 A027266 this_sequence A129796 A129790 A121156` `Adjacent sequences: A027258 A027259 A027260 this_sequence A027262 A027263 A027264`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

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