Number of ways to place zero or more nonadjacent 1,0 2,0 2,1 2,2 3,0 3,1 4,2 polyhexes in any orientation on a planar nXnXn triangular grid.
A155315
Number of ways to place zero or more nonadjacent 1,0 2,0 2,1 2,2 3,0 3,1 4,2 polyhexes in any orientation on a planar nXnXn triangular grid.
Terms
- a(0) =1a(1) =7a(2) =19a(3) =37a(4) =61a(5) =503a(6) =4407a(7) =23093a(8) =93285a(9) =817543a(10) =14192015a(11) =204195517a(12) =2243020429a(13) =32774055967a(14) =863753860919
External references
- oeis: A155315