id:A110126 - OEIS Search Results

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Diagonal sums of a scaled Legendre triangle.

+0
2

1, 0, -1, 2, 11, 12, 19, 174, 1073, 6584, 45871, 337098, 2563293, 20346204, 169904575, 1501012310, 14065496355, 139601710224, 1460544299739, 16007830782402, 182743810845223, 2163753452707580, 26506423427738891, 335585442530912862, 4389743577358599363 (list; graph; listen)

	OFFSET	`0,4`
	COMMENT	`Diagonal sums of A110124.`
	FORMULA	`a(n)=sum{k=0..floor(n/2), 2^(n-2k)*LegendreP(n-2k, k)}.`
	CROSSREFS	`Sequence in context: A160948 A136971 A061677 this_sequence A125020 A065020 A136986` `Adjacent sequences: A110123 A110124 A110125 this_sequence A110127 A110128 A110129`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Jul 13 2005`

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research