52566

Appears in sequences

• Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 3,2 4,2 5,3 6,4 7,4 polyhexes in any orientation on a planar nXnXn triangular grid.at n=8A155427
• a(n) = 121*n^2 - 38*n + 3.at n=20A157443
• a(n) = Sum_{k=1..n} k^2 * tau(k)^2, where tau is A000005.at n=19A320897