id:A027288 - OEIS Search Results

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

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1, 4, 12, 46, 145, 552, 1820, 6918, 23562, 89645, 312664, 1191885, 4232345, 16170728, 58229100, 222997812, 811985790, 3116622123, 11451785640, 44047806725, 163072988442, 628465576101 (list; graph; listen)

	OFFSET	`0,2`
	CROSSREFS	`Sequence in context: A151432 A006735 A166115 this_sequence A149370 A149371 A149372` `Adjacent sequences: A027285 A027286 A027287 this_sequence A027289 A027290 A027291`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.

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