Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,0 polyhexes in any orientation on a planar nXnXn triangular grid.
A155223
Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,0 polyhexes in any orientation on a planar nXnXn triangular grid.
Terms
- a(0) =1a(1) =4a(2) =10a(3) =45a(4) =176a(5) =869a(6) =5649a(7) =44314a(8) =456024a(9) =5472215a(10) =82109824a(11) =1515983373a(12) =34737855825a(13) =992142189277
External references
- oeis: A155223