Number of n X n 0..4 arrays with each element equal to the number of its horizontal and vertical zero neighbors.
A197048
Number of n X n 0..4 arrays with each element equal to the number of its horizontal and vertical zero neighbors.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =42a(4) =358a(5) =4468a(6) =88056a(7) =2745186a(8) =134355866a(9) =10264692132
External references
- oeis: A197048