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

A155410

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

Terms

    a(0) =1a(1) =7a(2) =19a(3) =37a(4) =94a(5) =297a(6) =1458a(7) =9766a(8) =53099a(9) =308101a(10) =2235851a(11) =20215398a(12) =229099105a(13) =2888943253a(14) =39401146662a(15) =624852187290

External references