A384856 E.g.f. A(x) satisfies A(x) = exp( x/A(-x*A(x)^2)^3 ).
1, 1, 7, 28, -107, -11744, -519101, -12366080, -101065751, 19899785728, 2369020104991, 160985802059776, 8664193820140093, 137309806362677248, -48557247646714851365, -9196626471351773732864, -1230646715294157585659951, -124354471985557029636669440, -8657982884640209349171498569
Offset: 0
Keywords
Programs
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PARI
a(n, k=-1) = if(n*k==0, 0^n, (-1)^n*k*sum(j=1, n, (-2*n+2*j+k)^(j-1)*binomial(n, j)*a(n-j, 3*j)));
Formula
See A384860.