Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and column sum 3 or 6 and every diagonal and antidiagonal sum not 3 or 6.
A251778
Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and column sum 3 or 6 and every diagonal and antidiagonal sum not 3 or 6.
Terms
- a(0) =55766a(1) =1317638a(2) =9758786a(3) =60326174a(4) =1341002006a(5) =10300749962a(6) =63113882510
External references
- oeis: A251778