id:A132168 - OEIS Search Results

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Alternating row sums of triangle A132166 (s1(7)).

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1, 20, 295, 3485, 33496, 247799, 1010905, -7422100, -238118825, -3513857515, -38530770320, -329008652665, -1926925302575, -594574697500, 188633380315975, 3451130126965325, 42502627523897800, 406764806549554775, 2912899847916711625 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n)=sum(A132166(n,m)(-1)^(m-1),m=1..n), n>=1.` `O.g.f.: g(x)/(1+g(x)) with g(x)=(1-(1-6x)^6)/(36(1-6x)^6), o.g.f. first column of A132166.`
	CROSSREFS	`Cf. A132167 (row sums of A132166).` `Sequence in context: A016309 A016259 A047795 this_sequence A069326 A001708 A016255` `Adjacent sequences: A132165 A132166 A132167 this_sequence A132169 A132170 A132171`
	KEYWORD	`sign,easy`
	AUTHOR	`Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) Oct 12 2007`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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