161540

Appears in sequences

• G.f.: Sum_{n>=0} (n+1)*(n+2)*(n+3)/3! * (x + x^n)^n.at n=43A325999
• E.g.f. A(x) satisfies 1 = Sum_{n>=0} ( A(x)^n + LambertW(-x) )^n / n!.at n=6A386648