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

A252139

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

Terms

    a(0) =172a(1) =134a(2) =134a(3) =209a(4) =156a(5) =209a(6) =439a(7) =431a(8) =431a(9) =439a(10) =909a(11) =1183a(12) =1535a(13) =1183a(14) =909a(15) =1864a(16) =3163a(17) =5233a(18) =5233a(19) =3163a(20) =1864a(21) =3905a(22) =8684a(23) =18047a(24) =22766a(25) =18047a(26) =8684a(27) =3905a(28) =8406a(29) =24031

External references