50225

Appears in sequences

• Number of different words that can be formed from an n X n grid of letters, reading horizontally, vertically or diagonally.at n=24A034720
• Number of fused bicyclic skeletons with n carbon atoms (see Parks et al. for precise definition).at n=10A121327
• Number of intersections of at least four edges in a cube of n X n X n smaller cubes.at n=35A126562
• Numbers k such that k and k^2 use only the digits 0, 2, 5 and 6.at n=26A136911
• Numbers k such that k and k^2 use only the digits 0, 2, 5, 6 and 8.at n=38A136913
• Numbers k such that k and k^2 use only the digits 0, 2, 5, 6 and 9.at n=36A136914
• a(n) = Sum_{p in P} (H(2,p)^2)/2, where P is the set of partitions of n, and H(2,p) is the number of hooks of length 2 in p.at n=31A302348
• a(n) = Sum_{k=1..n} k^2 * floor(n/k)^n.at n=5A350125