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 1 3 6 or 7.

A252321

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 1 3 6 or 7.

Terms

    a(0) =1557a(1) =2498a(2) =2498a(3) =4197a(4) =1974a(5) =4197a(6) =7815a(7) =1918a(8) =1918a(9) =7815a(10) =15269a(11) =2579a(12) =2493a(13) =2579a(14) =15269a(15) =28883a(16) =5029a(17) =6011a(18) =6011a(19) =5029a(20) =28883a(21) =56052a(22) =10448a(23) =18820a(24) =23422a(25) =18820a(26) =10448a(27) =56052a(28) =111752a(29) =25875

External references