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

A155322

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

Terms

    a(0) =1a(1) =4a(2) =10a(3) =19a(4) =46a(5) =199a(6) =890a(7) =4075a(8) =20900a(9) =140127a(10) =1098924a(11) =9985570a(12) =103452546a(13) =1269141243a(14) =18318539114a(15) =311054175156

External references