Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 2,2 polyhexes in any orientation on a planar nXnXn triangular grid.
A155232
Number of ways to place zero or more nonadjacent 0,0 1,0 1,1 2,0 2,2 polyhexes in any orientation on a planar nXnXn triangular grid.
Terms
- a(0) =1a(1) =4a(2) =10a(3) =22a(4) =40a(5) =361a(6) =2821a(7) =19057a(8) =110575a(9) =1423822a(10) =26284909a(11) =502358770a(12) =9341556682a(13) =253322462407
External references
- oeis: A155232