Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 5 6 or 7.
A252566
Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 5 6 or 7.
Terms
- a(0) =702a(1) =868a(2) =4168a(3) =25882a(4) =498696a(5) =11285381a(6) =155864925a(7) =12185963853a(8) =945844092853
External references
- oeis: A252566