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

A252457

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

Terms

    a(0) =661a(1) =228a(2) =228a(3) =323a(4) =334a(5) =323a(6) =747a(7) =959a(8) =959a(9) =747a(10) =1731a(11) =2643a(12) =3366a(13) =2643a(14) =1731a(15) =3938a(16) =7223a(17) =11334a(18) =11334a(19) =7223a(20) =3938a(21) =9013a(22) =20242a(23) =38966a(24) =48170a(25) =38966a(26) =20242a(27) =9013a(28) =20820a(29) =56643

External references