Counts of unique periodic binary strings of length n.

Terms

a(0) =0a(1) =0a(2) =2a(3) =2a(4) =4a(5) =2a(6) =10a(7) =2a(8) =16a(9) =8a(10) =34a(11) =2a(12) =76a(13) =2a(14) =130a(15) =38a(16) =256a(17) =2a(18) =568a(19) =2a(20) =1036a(21) =134a(22) =2050a(23) =2a(24) =4336a(25) =32a(26) =8194a(27) =512a(28) =16396a(29) =2