65442

Appears in sequences

• Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 2,1 2,2 3,1 3,2 polyhexes in any orientation on a planar n X n X n triangular grid.at n=8A155356
• a(n) is the number of isosceles trapezoids in a triangular grid of side length n.at n=23A389363