id:A134139 - OEIS Search Results

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Alternating row sums of triangle A049353 (S1p(5)).

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1, 4, 16, 44, -244, -7336, -112664, -1406336, -14058944, -66627136, 1879992896, 85070733824, 2359547577856, 54106723270144, 1055100890838016, 15611883969810944, 48348082318102016, -9055743653514520576, -521351156412528902144 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n)=sum(A049353(n,m)(-1)^(m-1),m=1..n), n>=1.` `E.g.f.: 1-exp(-x(2-x)(2-2x+x^2)/(4*(1-x)^4)). Cf. e.g.f. first column of A049353.`
	CROSSREFS	`Cf. A049378 (row sums of A049353).` `Adjacent sequences: A134136 A134137 A134138 this_sequence A134140 A134141 A134142` `Sequence in context: A034131 A018210 A054498 this_sequence A097125 A000704 A007315`
	KEYWORD	`sign,easy`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) Oct 12 2007`

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Last modified May 16 22:57 EDT 2008. Contains 139737 sequences.

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