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

Terms

a(0) =10a(1) =28a(2) =28a(3) =76a(4) =128a(5) =76a(6) =208a(7) =544a(8) =544a(9) =208a(10) =568a(11) =2384a(12) =3360a(13) =2384a(14) =568a(15) =1552a(16) =10384a(17) =21968a(18) =21968a(19) =10384a(20) =1552a(21) =4240a(22) =45392a(23) =140816a(24) =221968a(25) =140816a(26) =45392a(27) =4240a(28) =11584a(29) =198352