306735

Appears in sequences

• Number of rooted cubic maps with 2n nodes and a distinguished Hamiltonian cycle: (2n)!(2n+1)! / (n!^2*(n+1)!(n+2)!).at n=6A000356
• Tenth column of trinomial coefficients.at n=10A064054
• Triangle T(n,k) read by rows: related to David G. Cantor's sigma function.at n=61A073165
• Square array T(n,k) read by antidiagonals: T(n,k) = Product_{1<=i<=j<=k} (n+i+j-1)/(i+j-1).at n=41A102539
• Triangular array, read by rows, associated with sums of certain Vandermonde determinants.at n=50A133112
• Dimensions of certain Lie algebra (see reference for precise definition).at n=7A133355
• G.f. satisfies A(x) = 1 + x^4*A(x)*(1 + x*A(x)).at n=47A365727