Number of non-equivalent (mod D_3) ways to arrange 3 indistinguishable points on a triangular grid of side n so that no three points are collinear.
A234351
Number of non-equivalent (mod D_3) ways to arrange 3 indistinguishable points on a triangular grid of side n so that no three points are collinear.
Terms
- a(0) =1a(1) =5a(2) =22a(3) =77a(4) =217a(5) =530a(6) =1149a(7) =2288a(8) =4231a(9) =7400a(10) =12322a(11) =19725a(12) =30486a(13) =45768a(14) =66917a(15) =95669
External references
- oeis: A234351