T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock singular.

Terms

a(0) =31a(1) =143a(2) =143a(3) =593a(4) =1489a(5) =593a(6) =2553a(7) =12361a(8) =12361a(9) =2553a(10) =10847a(11) =115979a(12) =154561a(13) =115979a(14) =10847a(15) =46303a(16) =1058503a(17) =2490449a(18) =2490449a(19) =1058503a(20) =46303a(21) =197329a(22) =9856209a(23) =35659489a(24) =80761059a(25) =35659489a(26) =9856209a(27) =197329a(28) =841449a(29) =91539073