Number of (5+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 4 6 or 7.
A252645
Number of (5+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 4 6 or 7.
Terms
- a(0) =4382a(1) =28978a(2) =145594a(3) =395940a(4) =2641643a(5) =14252070a(6) =39238223a(7) =282076967a(8) =1562428650a(9) =4317049341a(10) =33191406729a(11) =186102810754a(12) =519319781185
External references
- oeis: A252645