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

A155370

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

Terms

    a(0) =1a(1) =7a(2) =19a(3) =37a(4) =124a(5) =545a(6) =2932a(7) =15809a(8) =100710a(9) =785638a(10) =7143835a(11) =76372256a(12) =962177079a(13) =14293799953a(14) =248275319618

External references