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 one or less.
A195228
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 one or less.
Terms
- a(0) =5a(1) =29a(2) =337a(3) =7705a(4) =348849a(5) =31374671a(6) =5618308863
External references
- oeis: A195228