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

A155274

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

Terms

    a(0) =1a(1) =3a(2) =9a(3) =19a(4) =33a(5) =122a(6) =733a(7) =3984a(8) =18507a(9) =108272a(10) =955732a(11) =10449887a(12) =117050472a(13) =1441595909a(14) =22302751858a(15) =436682293027

External references