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 5 6 or 8.

A252473

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 5 6 or 8.

Terms

    a(0) =570a(1) =716a(2) =716a(3) =1299a(4) =682a(5) =1299a(6) =2380a(7) =813a(8) =813a(9) =2380a(10) =4507a(11) =1463a(12) =1741a(13) =1463a(14) =4507a(15) =8624a(16) =3497a(17) =5367a(18) =5367a(19) =3497a(20) =8624a(21) =17061a(22) =9056a(23) =18175a(24) =22832a(25) =18175a(26) =9056a(27) =17061a(28) =34876a(29) =24331

External references