Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 5 6 or 7.
A252422
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 5 6 or 7.
Terms
- a(0) =5725a(1) =12214a(2) =53782a(3) =113324a(4) =715123a(5) =3582225a(6) =7509929a(7) =47586055a(8) =239646231a(9) =500354430a(10) =3170646607a(11) =15978230331a(12) =33346465798a(13) =211307919221
External references
- oeis: A252422