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

A155445

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

Terms

    a(0) =1a(1) =4a(2) =10a(3) =19a(4) =40a(5) =123a(6) =434a(7) =1945a(8) =8733a(9) =42692a(10) =242511a(11) =1635703a(12) =12770421a(13) =112939524a(14) =1121434189a(15) =12675288592a(16) =164781726936

External references