Number of defective 4-colorings of an n X n 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..3 order.
A229748
Number of defective 4-colorings of an n X n 0..3 array connected horizontally, vertically, diagonally and antidiagonally with exactly two mistakes, and colors introduced in row-major 0..3 order.
Terms
- a(0) =0a(1) =3a(2) =598a(3) =6561a(4) =29776a(5) =102271a(6) =314700a(7) =914039a(8) =2561548a(9) =6994695a(10) =18701748a(11) =49101007a(12) =126846084a(13) =322964975a(14) =811594012a(15) =2015425287a(16) =4951261596
External references
- oeis: A229748