A375947 Expansion of e.g.f. 1 / (1 + 4 * log(1 - x))^(3/2).
1, 6, 66, 1032, 20856, 516384, 15129600, 511880160, 19637499360, 842285112000, 39939749040960, 2074625404323840, 117151213971202560, 7145371319204666880, 468138620331976343040, 32788234887866638709760, 2444773199922430356833280
Offset: 0
Keywords
Programs
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Mathematica
nmax=16; CoefficientList[Series[1 / (1 + 4 * Log[1-x])^(3/2),{x,0,nmax}],x]*Range[0,nmax]! (* Stefano Spezia, Sep 03 2024 *) -
PARI
a000407(n) = (2*n+1)!/n!; a(n) = sum(k=0, n, a000407(k)*abs(stirling(n, k, 1)));
Formula
a(n) = Sum_{k=0..n} A000407(k) * |Stirling1(n,k)|.