id:A027289 - OEIS Search Results

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a(n) = Sum{T(n,k)*T(n,k+2)}, 0<=k<=[ n/2 ]-1, T given by A026009.

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1, 3, 18, 55, 264, 847, 3744, 12465, 52868, 180895, 749220, 2617173, 10680656, 37915317, 153240864, 551019963, 2212417314, 8038946075, 32129224712, 117758845827, 469105048654 (list; graph; listen)

	OFFSET	`2,2`
	CROSSREFS	`Sequence in context: A085789 A027334 A130505 this_sequence A061317 A139362 A012763` `Adjacent sequences: A027286 A027287 A027288 this_sequence A027290 A027291 A027292`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified September 5 17:15 EDT 2008. Contains 143476 sequences.

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