Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 3,1 4,0 5,1 polyhexes in any orientation on a planar n X n X n triangular grid.
A155326
Number of ways to place zero or more nonadjacent 1,0 1,1 2,0 3,0 3,1 4,0 5,1 polyhexes in any orientation on a planar n X n X n triangular grid.
Terms
- a(0) =1a(1) =4a(2) =13a(3) =28a(4) =111a(5) =502a(6) =1855a(7) =10932a(8) =85106a(9) =591988a(10) =5415550a(11) =64685900a(12) =769802654a(13) =11442223576
External references
- oeis: A155326