212649

Appears in sequences

• Number of ways to place zero or more nonadjacent 1,0 1,1 2,1 3,1 4,2 4,3 polyhexes in any orientation on a planar nXnXn triangular grid.at n=7A155284
• Expansion of Product_{k>=1} 1/(1 - x^k)^(k*(k+1)^2/2).at n=10A302447