54106

Appears in sequences

• a(n) = ceiling(binomial(n,6)/n).at n=35A053643
• a(n) = 3*n^3 + 2*n^2 + n.at n=26A067389
• A014486-indices of binary trees whose left and right subtree are identical.at n=35A083938
• L.g.f.: -log(Product_{k>=1} (1 - k*x^k)^k) = Sum_{n>=1} a(n)*x^n/n.at n=19A296601
• Number of nX3 0..1 arrays with every element equal to 1, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.at n=5A299062
• Number of nX6 0..1 arrays with every element equal to 1, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.at n=2A299065
• T(n,k) = Number of n X k 0..1 arrays with every element equal to 1, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.at n=30A299067
• T(n,k) = Number of n X k 0..1 arrays with every element equal to 1, 2, 3, 4, 5 or 6 king-move adjacent elements, with upper left element zero.at n=33A299067
• Number of fault-free tilings of a 3 X n rectangle with squares and dominoes.at n=14A334396