188420domain: NAppears in sequencesa(n) = 2^(n-1)*(4*n-6) + 4.at n=13A048497G.f. satisfies: A(x) = exp( Sum_{n>=1} (A(x) - (-1)^n)^n * x^n/n ).at n=10A202668Number of primitive maps on n edges.at n=11A220898