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

A252210

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

Terms

    a(0) =2680a(1) =4743a(2) =4743a(3) =9312a(4) =5178a(5) =9312a(6) =19794a(7) =17276a(8) =17276a(9) =19794a(10) =51024a(11) =44322a(12) =110128a(13) =44322a(14) =51024a(15) =125554a(16) =215814a(17) =332462a(18) =332462a(19) =215814a(20) =125554a(21) =278710a(22) =932474a(23) =2908856a(24) =1180226a(25) =2908856a(26) =932474a(27) =278710a(28) =763726a(29) =2568954

External references