810084

Appears in sequences

• Number of rooted toroidal maps with 2 faces, n vertices and no isthmuses.at n=15A006469
• a(n) = binomial(n+7, 7)*(n+4)/4.at n=15A053347
• Sum of jump-lengths of all binary trees with n edges.at n=11A127533
• Number of ways to select 15 knights from n knights sitting at a round table if no adjacent knights are chosen.at n=8A188225