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A117266
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Row sums of triangle A117265.
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1
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1, 2, 6, 37, 497, 14033, 813857, 95996993, 22913626241, 11034472530177, 10699863490757121, 20863301244829828097, 81721932792141693585409, 642577422892784159654154241, 10136733849914528413869372612609
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = Sum_{k=0..n} (2*(n-k))!/((n-k)!*(n-k)!)*2^((n-k)*(n+k-3)/2)).
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PROG
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(PARI) a(n)=sum(k=0, n, (2*(n-k))!/((n-k)!*(n-k)!)*2^((n-k)*(n+k-3)/2))
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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