Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 polyhexes in any orientation on a planar nXnXn triangular grid.
A155225
Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 3,2 polyhexes in any orientation on a planar nXnXn triangular grid.
Terms
- a(0) =1a(1) =3a(2) =7a(3) =13a(4) =38a(5) =180a(6) =805a(7) =3814a(8) =25700a(9) =220335a(10) =2064779a(11) =23174247a(12) =331474649a(13) =5713874467a(14) =116010028877
External references
- oeis: A155225