T(n,k)=Number of (n+2)X(k+2) binary arrays with each 3X3 subblock having a positive determinant.

Terms

a(0) =87a(1) =267a(2) =267a(3) =792a(4) =1217a(5) =792a(6) =2328a(7) =5050a(8) =5050a(9) =2328a(10) =6915a(11) =18376a(12) =26868a(13) =18376a(14) =6915a(15) =20475a(16) =77987a(17) =128303a(18) =128303a(19) =77987a(20) =20475a(21) =60588a(22) =319247a(23) =743667a(24) =836891a(25) =743667a(26) =319247a(27) =60588a(28) =179442a(29) =1206478