Number of non-equivalent (mod D_3) ways to arrange 4 indistinguishable points on a triangular grid of side n so that no three points are collinear.
A234352
Number of non-equivalent (mod D_3) ways to arrange 4 indistinguishable points on a triangular grid of side n so that no three points are collinear.
Terms
- a(0) =2a(1) =24a(2) =153a(3) =713a(4) =2557a(5) =7661a(6) =20055a(7) =47153a(8) =101821a(9) =205322a(10) =390580a(11) =707708a(12) =1229969a(13) =2060777a(14) =3344487
External references
- oeis: A234352