Number of lower triangles of an n X n 0..2 array with no element differing from any of its horizontal or vertical neighbors by more than one.
A194925
Number of lower triangles of an n X n 0..2 array with no element differing from any of its horizontal or vertical neighbors by more than one.
Terms
- a(0) =3a(1) =17a(2) =217a(3) =5873a(4) =344091a(5) =43337009a(6) =11761200209
External references
- oeis: A194925