Number of (7+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.
A252581
Number of (7+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) =8279a(1) =39419a(2) =275252a(3) =802760a(4) =7115253a(5) =53055996a(6) =155864925a(7) =1380518004a(8) =10339904588a(9) =30371389585a(10) =268585630512
External references
- oeis: A252581