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1, 2, 15, 192, 3635, 92730, 2998366, 117857600, 5465922021, 292505725990, 17755023166100, 1205937035790936, 90649549598544937, 7473077539914412930, 670529221966656416145, 65059053545271098896848
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OFFSET
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0,2
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COMMENTS
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a(n) is divisible by (n+1): a(n)/(n+1) = A127091(n).
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LINKS
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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)*Sum[T[r, c], {c, k, r}], {r, k, n-1}] + x^(n+1))^(k+1), x, n-k]]; Table[T[2*n, n], {n, 0, 15}] (* G. C. Greubel, Jan 30 2020 *)
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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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