id:A027009 - OEIS Search Results

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a(n) = T(n,m) + T(n,m+1) + ... + T(n,n), where m=[ (n+2)/2 ], T given by A026998.

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1, 1, 9, 14, 46, 81, 209, 389, 901, 1726, 3774, 7349, 15541, 30561, 63329, 125294, 256366, 509161, 1033449, 2057549, 4154701, 8284926, 16673534, 33282989, 66837421, 133507081, 267724809, 535010414, 1071881326, 2142612801 (list; graph; listen)

	OFFSET	`1,3`
	FORMULA	`G.f.: x(-2x^4-x^3+4x^2-x+1)/[(1-2x)(1+x-x^2)(1-x-x^2)].`
	CROSSREFS	`Sequence in context: A066793 A139055 A079625 this_sequence A131224 A073920 A130119` `Adjacent sequences: A027006 A027007 A027008 this_sequence A027010 A027011 A027012`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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