Number of n X n symmetric 0..3 arrays with each element equal to the sum mod 4 of two of its horizontal and vertical neighbors.
A193120
Number of n X n symmetric 0..3 arrays with each element equal to the sum mod 4 of two of its horizontal and vertical neighbors.
Terms
- a(0) =0a(1) =1a(2) =17a(3) =525a(4) =60155a(5) =26946822a(6) =36060642759
External references
- oeis: A193120