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A127127
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Column 0 of triangle A127126.
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10
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1, 1, 3, 13, 77, 587, 5484, 60582, 771261, 11102828, 178144861, 3149976426, 60825085447, 1273060083700, 28700081677767, 693217471426114, 17857152401368800, 488620956679818191, 14152040894854881662, 432509671322583878614, 13908794132963653028146
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OFFSET
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0,3
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COMMENTS
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For n > 0, equals one-half of the row sums of triangle A127126.
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LINKS
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G. C. Greubel, Table of n, a(n) for n = 0..80
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MATHEMATICA
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T[n_, k_]:= T[n, k]= If[k==n, 1, Coefficient[(1 +x*Sum[x^(r-k-1)*Sum[T[r, c], {c, k+1, r}], {r, k+1, n}] + x^(n+1))^(k+1), x, n-k]]; Table[T[n, 0], {n, 0, 20}] (* G. C. Greubel, Jan 28 2020 *)
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CROSSREFS
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Cf. A127126, A127128, A127129, A127130, A127131, A127132, A127133, A127134, A127135.
Sequence in context: A032035 A351421 A273953 * A043301 A141762 A062872
Adjacent sequences: A127124 A127125 A127126 * A127128 A127129 A127130
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KEYWORD
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nonn
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AUTHOR
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Paul D. Hanna, Jan 05 2007
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STATUS
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approved
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