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

A251779

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

Terms

    a(0) =470a(1) =1142a(2) =1142a(3) =2402a(4) =4182a(5) =2402a(6) =4790a(7) =12242a(8) =12242a(9) =4790a(10) =12302a(11) =34934a(12) =43778a(13) =34934a(14) =12302a(15) =27242a(16) =132886a(17) =144818a(18) =144818a(19) =132886a(20) =27242a(21) =55766a(22) =430730a(23) =748002a(24) =524774a(25) =748002a(26) =430730a(27) =55766a(28) =148022a(29) =1317638

External references