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

A155368

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

Terms

    a(0) =1a(1) =4a(2) =10a(3) =19a(4) =34a(5) =55a(6) =406a(7) =2950a(8) =17731a(9) =91675a(10) =408976a(11) =3333241a(12) =44182549a(13) =642260617a(14) =9294897961a(15) =125470980640

External references