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

A252243

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

Terms

    a(0) =342a(1) =858a(2) =858a(3) =2174a(4) =3896a(5) =2174a(6) =4708a(7) =16056a(8) =16056a(9) =4708a(10) =13376a(11) =43848a(12) =108882a(13) =43848a(14) =13376a(15) =34364a(16) =215424a(17) =331884a(18) =331884a(19) =215424a(20) =34364a(21) =74824a(22) =932024a(23) =2908368a(24) =1179792a(25) =2908368a(26) =932024a(27) =74824a(28) =213344a(29) =2568432

External references