T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 3 4 6 or 7.

A252544

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 1 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 1 3 4 6 or 7.

Terms

    a(0) =478a(1) =1048a(2) =850a(3) =2532a(4) =3880a(5) =2142a(6) =5608a(7) =15480a(8) =15480a(9) =4644a(10) =14824a(11) =43848a(12) =88146a(13) =43848a(14) =13104a(15) =38780a(16) =213120a(17) =331884a(18) =331884a(19) =213120a(20) =33852a(21) =89048a(22) =881848a(23) =2576592a(24) =1179792a(25) =2576592a(26) =881848a(27) =73800a(28) =237360a(29) =2568432

External references