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A110126
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Diagonal sums of a scaled Legendre triangle.
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1
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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
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OFFSET
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0,4
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COMMENTS
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LINKS
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FORMULA
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a(n)=sum{k=0..floor(n/2), 2^(n-2k)*LegendreP(n-2k, k)}.
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CROSSREFS
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KEYWORD
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easy,sign
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AUTHOR
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STATUS
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approved
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