Number of lower triangles of an n X n 0..4 array with each element differing from all of its horizontal and vertical neighbors by one.
A194994
Number of lower triangles of an n X n 0..4 array with each element differing from all of its horizontal and vertical neighbors by one.
Terms
- a(0) =5a(1) =14a(2) =66a(3) =458a(4) =4990a(5) =81014a(6) =2059822a(7) =78060014a(8) =4641074078a(9) =410310652370
External references
- oeis: A194994