Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.
A252678
Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 2 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 2 5 6 or 7.
Terms
- a(0) =3654a(1) =10933a(2) =42376a(3) =147462a(4) =722737a(5) =2879551a(6) =10457376a(7) =51419273a(8) =205046275a(9) =746995324a(10) =3673397944a(11) =14669046377a(12) =53468954588a(13) =262743913893
External references
- oeis: A252678