233286

Appears in sequences

• Expansion of 1/((1-x)*(1-2*x^2)*(1-3*x^3)).at n=27A291986
• Triangle read by rows: T(n,k) is the number of embeddings on the sphere of 2-connected homeomorphically irreducible planar graphs with n nodes and k faces, k=4..2n-4.at n=59A378075