100423domain: NAppears in sequencesa(n) = Sum_{k=1..n} ceiling(k^4/n).at n=25A014816a(n) = 139*n^2 - 2307*n + 3331.at n=36A230307E.g.f. A(x) satisfies: A(x) = P(x)/Q(x) where P(x) = Sum_{n>=0} (2^n*x^n/n!) * exp(x*A(x)^n) and Q(x) = Sum_{n>=0} (x^n/n!) * exp(x*A(x)^n).at n=7A341377