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

A155302

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

Terms

    a(0) =1a(1) =4a(2) =10a(3) =19a(4) =31a(5) =129a(6) =761a(7) =3423a(8) =12503a(9) =65847a(10) =587331a(11) =5621100a(12) =47590431a(13) =445495212a(14) =5880381069a(15) =98943434625

External references