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A110126 Diagonal sums of a scaled Legendre triangle. 1
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; refs; listen; history; text; internal format)
OFFSET

0,4

COMMENTS

Diagonal sums of A110124.

LINKS

Table of n, a(n) for n=0..24.

FORMULA

a(n)=sum{k=0..floor(n/2), 2^(n-2k)*LegendreP(n-2k, k)}.

CROSSREFS

Sequence in context: A299973 A136971 A061677 * A125020 A065020 A136986

Adjacent sequences:  A110123 A110124 A110125 * A110127 A110128 A110129

KEYWORD

easy,sign

AUTHOR

Paul Barry, Jul 13 2005

STATUS

approved

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Last modified August 8 02:22 EDT 2020. Contains 336290 sequences. (Running on oeis4.)