Triangle T(n, k) = Numbers of non-equivalent (mod D_3) ways to place k points on a triangular grid of side n so that no two of them are adjacent. Triangle read by rows.
A239572
Triangle T(n, k) = Numbers of non-equivalent (mod D_3) ways to place k points on a triangular grid of side n so that no two of them are adjacent. Triangle read by rows.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =2a(4) =1a(5) =3a(6) =6a(7) =6a(8) =1a(9) =4a(10) =16a(11) =32a(12) =24a(13) =7a(14) =1a(15) =5a(16) =32a(17) =113a(18) =200a(19) =176a(20) =66a(21) =6a(22) =7a(23) =60a(24) =329a(25) =1053a(26) =1976a(27) =2096a(28) =1162a(29) =302
External references
- oeis: A239572