Number of (n+1)X(n+1) 0..6 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.
A203879
Number of (n+1)X(n+1) 0..6 arrays with every 2X2 subblock having equal diagonal elements or equal antidiagonal elements.
Terms
- a(0) =637a(1) =254359a(2) =543848893
External references
- oeis: A203879