Number of lower triangles of an n X n 0..3 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less.
A195243
Number of lower triangles of an n X n 0..3 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less.
Terms
- a(0) =4a(1) =46a(2) =1682a(3) =190514a(4) =67379894a(5) =74236765958
External references
- oeis: A195243