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

A252514

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

Terms

    a(0) =1262a(1) =1515a(2) =1515a(3) =2055a(4) =1644a(5) =2055a(6) =3326a(7) =3980a(8) =3980a(9) =3326a(10) =5508a(11) =9277a(12) =11476a(13) =9277a(14) =5508a(15) =9526a(16) =25197a(17) =28877a(18) =28877a(19) =25197a(20) =9526a(21) =17709a(22) =76113a(23) =83016a(24) =68163a(25) =83016a(26) =76113a(27) =17709a(28) =33357a(29) =231372

External references