T(n,k)=Number of (n+1)X(k+1) binary arrays with every 2X2 subblock nonsingular.

Terms

a(0) =6a(1) =12a(2) =12a(3) =24a(4) =32a(5) =24a(6) =48a(7) =80a(8) =80a(9) =48a(10) =96a(11) =208a(12) =256a(13) =208a(14) =96a(15) =192a(16) =528a(17) =832a(18) =832a(19) =528a(20) =192a(21) =384a(22) =1360a(23) =2688a(24) =3472a(25) =2688a(26) =1360a(27) =384a(28) =768a(29) =3472