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

A252523

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

Terms

    a(0) =806a(1) =791a(2) =791a(3) =475a(4) =432a(5) =475a(6) =660a(7) =798a(8) =798a(9) =660a(10) =1093a(11) =1169a(12) =1783a(13) =1169a(14) =1093a(15) =1471a(16) =2492a(17) =2818a(18) =2818a(19) =2492a(20) =1471a(21) =2176a(22) =5214a(23) =8354a(24) =5628a(25) =8354a(26) =5214a(27) =2176a(28) =3809a(29) =9069

External references