Number of lower triangles of an n X n 0..4 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less.
A195244
Number of lower triangles of an n X n 0..4 array with each element differing from all of its diagonal, vertical, antidiagonal and horizontal neighbors by two or less.
Terms
- a(0) =5a(1) =65a(2) =2729a(3) =357847a(4) =147824001a(5) =192172956591
External references
- oeis: A195244