T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 4 5 or 7.

A252000

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 4 5 or 7.

Terms

    a(0) =1198a(1) =6094a(2) =6094a(3) =43572a(4) =77488a(5) =43572a(6) =340164a(7) =1209382a(8) =1209382a(9) =340164a(10) =2708560a(11) =19275074a(12) =38479934a(13) =19275074a(14) =2708560a(15) =21680096a(16) =308552418a(17) =1231596986a(18) =1231596986a(19) =308552418a(20) =21680096a(21) =173871388a(22) =4946174244a(23) =39474106776

External references