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

A155392

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

Terms

    a(0) =1a(1) =4a(2) =13a(3) =28a(4) =49a(5) =96a(6) =501a(7) =3463a(8) =18127a(9) =74376a(10) =331418a(11) =2409920a(12) =26775212a(13) =305337017a(14) =3047283148a(15) =31207251008a(16) =409221933719

External references