Number of ways to place zero or more nonadjacent 2,1 2,2 3,0 3,1 4,2 4,3 polyhexes in any orientation on a planar nXnXn triangular grid.

A155314

Number of ways to place zero or more nonadjacent 2,1 2,2 3,0 3,1 4,2 4,3 polyhexes in any orientation on a planar nXnXn triangular grid.

Terms

    a(0) =1a(1) =7a(2) =19a(3) =37a(4) =88a(5) =640a(6) =5031a(7) =26752a(8) =151436a(9) =1596386a(10) =24274062a(11) =343210818a(12) =4865294909a(13) =96524596845

External references