Number of (7+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.
A252647
Number of (7+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) =17046a(1) =205127a(2) =1812508a(3) =5124134a(4) =62261756a(5) =625096361a(6) =1669555189a(7) =21553739771a(8) =226520460975a(9) =581961166338
External references
- oeis: A252647