239752

Appears in sequences

• Number of tree-rooted planar maps with 3 vertices and n faces and no isthmuses.at n=6A006432
• a(n) = 12167n - 3588.at n=19A156846
• Triangle read by rows: T(n,k) is the number of tree-rooted planar maps with n edges, k faces and no isthmuses, n >= 0, k = 1..n+1.at n=42A342987