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

A155409

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

Terms

    a(0) =1a(1) =7a(2) =19a(3) =37a(4) =61a(5) =275a(6) =1767a(7) =10441a(8) =45245a(9) =228435a(10) =1707103a(11) =18329337a(12) =206589973a(13) =2188693403a(14) =25302969335a(15) =385488957361

External references