Number of (4+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 4 6 or 7.

A252562

Number of (4+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 2 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 2 4 6 or 7.

Terms

    a(0) =1265a(1) =3084a(2) =10585a(3) =24336a(4) =104515a(5) =386004a(6) =902276a(7) =3886119a(8) =14439854a(9) =33740636a(10) =145226515a(11) =541433298a(12) =1264809720a(13) =5437258963a(14) =20326627042a(15) =47472999320a(16) =203838402331a(17) =764011813890

External references