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A367157
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E.g.f. satisfies A(x) = 1 + A(x)^3 * log(1 + x*A(x)).
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2
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1, 1, 7, 107, 2528, 81324, 3317958, 164182458, 9555617008, 639681044040, 48424744784136, 4090543382765520, 381452559291894864, 38923292146836546864, 4313976527840736485280, 516083186352589573976208, 66281598254535375499398144, 9096262997259437367544137984
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OFFSET
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0,3
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LINKS
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FORMULA
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a(n) = Sum_{k=0..n} (n+3*k)!/(n+2*k+1)! * Stirling1(n,k).
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MATHEMATICA
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Table[Sum[(n+3*k)!/(n+2*k+1)! * StirlingS1[n, k], {k, 0, n}], {n, 0, 20}] (* Vaclav Kotesovec, Nov 10 2023 *)
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PROG
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(PARI) a(n) = sum(k=0, n, (n+3*k)!/(n+2*k+1)!*stirling(n, k, 1));
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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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