T(n,k)=Half the number of (n+2)X(k+2) binary arrays with each 3X3 subblock having a sum in 2..7.

A186796

T(n,k)=Half the number of (n+2)X(k+2) binary arrays with each 3X3 subblock having a sum in 2..7.

Terms

    a(0) =246a(1) =1910a(2) =1910a(3) =14825a(4) =29020a(5) =14825a(6) =115069a(7) =440505a(8) =440505a(9) =115069a(10) =893145a(11) =6687805a(12) =13066921a(13) =6687805a(14) =893145a(15) =6932452a(16) =101532811a(17) =387763760a(18) =387763760a(19) =101532811a(20) =6932452a(21) =53808589a(22) =1541462868a(23) =11506373601a(24) =22495797451

External references