A134138 - OEIS

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A134138

Alternating row sums of triangle A046089 (S1p(3)).

1, 2, 4, 2, -74, -916, -8672, -73564, -542852, -2595016, 18348496, 906083672, 21021502984, 406255974032, 7157641045696, 116383645516784, 1681549859135248, 18311613681506336, -3332917116147392 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	FORMULA	`a(n)=sum(A046089(n,m)(-1)^(m-1),m=1..n), n>=1.` `E.g.f.:1-exp(-x(2-x)/(2*(1-x)^2)). Cf. e.g.f. first column of A046089.`
	CROSSREFS	`Cf. A049377 (row sums of A046089).` `Sequence in context: A130172 A029589 A121819 * A201911 A048644 A106137` `Adjacent sequences: A134135 A134136 A134137 * A134139 A134140 A134141`
	KEYWORD	`sign,easy`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) Oct 12 2007`

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Last modified February 17 13:28 EST 2012. Contains 206031 sequences.