Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.

A252143

Number of (n+2)X(3+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 7.

Terms

    a(0) =5090a(1) =3073a(2) =5440a(3) =4416a(4) =9443a(5) =8964a(6) =21375a(7) =18900a(8) =49770a(9) =41768a(10) =119013a(11) =96890a(12) =286629a(13) =226328a(14) =711232a(15) =538534a(16) =1772259a(17) =1320292a(18) =4456963a(19) =3253910a(20) =11342342a(21) =8103478a(22) =28972257a(23) =20505766a(24) =74345217a(25) =52088960a(26) =191878288a(27) =133068656

External references