Number of ways to place zero or more nonadjacent 1,1 2,1 3,0 3,1 3,2 3,3 4,2 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.

A155372

Number of ways to place zero or more nonadjacent 1,1 2,1 3,0 3,1 3,2 3,3 4,2 5,2 polyhexes in any orientation on a planar nXnXn triangular grid.

Terms

    a(0) =1a(1) =7a(2) =19a(3) =37a(4) =61a(5) =206a(6) =1719a(7) =10790a(8) =47817a(9) =214975a(10) =1559070a(11) =18834488a(12) =235320165a(13) =2540394252a(14) =29093246624a(15) =443617991373

External references