T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4.

A252397

T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 4.

Terms

    a(0) =2205a(1) =21544a(2) =21544a(3) =224346a(4) =437023a(5) =224346a(6) =2302050a(7) =9807871a(8) =9807871a(9) =2302050a(10) =23364738a(11) =203636149a(12) =454970982a(13) =203636149a(14) =23364738a(15) =237415904a(16) =4246242886a(17) =19516646285a(18) =19516646285a(19) =4246242886a(20) =237415904a(21) =2418956843a(22) =89843675557

External references