720077

Appears in sequences

• Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 4,1 5,1 6,0 6,1 polyhexes in any orientation on a planar n X n X n triangular grid.at n=9A155399
• a(n) = L(n)*a(n-1) + a(n-2) with a(0) = a(1) = 1 and L(n) the Lucas numbers A000032.at n=7A337521