T(n,k)=Number of (n+1)X(k+1) binary arrays with no 2X2 subblock containing fewer than two 1s.

Terms

a(0) =11a(1) =35a(2) =35a(3) =108a(4) =195a(5) =108a(6) =337a(7) =1028a(8) =1028a(9) =337a(10) =1049a(11) =5529a(12) =8969a(13) =5529a(14) =1049a(15) =3268a(16) =29593a(17) =80812a(18) =80812a(19) =29593a(20) =3268a(21) =10179a(22) =158648a(23) =721939a(24) =1232795a(25) =721939a(26) =158648a(27) =10179a(28) =31707a(29) =850155