Number of lower triangles of an n X n 0..2 array with new values introduced in row major order 0..2 and no element equal to more than one horizontal or vertical neighbor.
A194534
Number of lower triangles of an n X n 0..2 array with new values introduced in row major order 0..2 and no element equal to more than one horizontal or vertical neighbor.
Terms
- a(0) =1a(1) =4a(2) =59a(3) =1851a(4) =119548a(5) =16039294a(6) =4460214471
External references
- oeis: A194534