Number of lower triangles of an n X n 0..5 array with each element differing from all of its horizontal and vertical neighbors by one.
A194995
Number of lower triangles of an n X n 0..5 array with each element differing from all of its horizontal and vertical neighbors by one.
Terms
- a(0) =6a(1) =18a(2) =90a(3) =672a(4) =7858a(5) =138956a(6) =3816148a(7) =159427052a(8) =10305467946
External references
- oeis: A194995