74376

Appears in sequences

• Endpoints (leaves) in rooted trees with n nodes.at n=12A003227
• Number of ways to place zero or more nonadjacent 1,1 2,1 3,0 3,1 4,2 4,3 4,4 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.at n=9A155392
• Number of non-equivalent binary n X n matrices with two nonadjacent 1's.at n=32A232567