Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 2,2 3,0 3,1 4,0 4,2 polyhexes in any orientation on a planar nXnXn triangular grid.
A155404
Number of ways to place zero or more nonadjacent 0,0 1,0 2,1 2,2 3,0 3,1 4,0 4,2 polyhexes in any orientation on a planar nXnXn triangular grid.
Terms
- a(0) =1a(1) =4a(2) =10a(3) =22a(4) =40a(5) =135a(6) =446a(7) =2376a(8) =12035a(9) =65714a(10) =364923a(11) =2734456a(12) =23495580a(13) =245925457a(14) =2738475904a(15) =35447846068a(16) =514467522739
External references
- oeis: A155404