Row sums of even numbered rows of array T in A050870 (periodic binary words).

Terms

a(0) =0a(1) =2a(2) =4a(3) =10a(4) =16a(5) =34a(6) =76a(7) =130a(8) =256a(9) =568a(10) =1036a(11) =2050a(12) =4336a(13) =8194a(14) =16396a(15) =33814a(16) =65536a(17) =131074a(18) =266176a(19) =524290a(20) =1048816a(21) =2113462a(22) =4194316a(23) =8388610a(24) =16842496a(25) =33555424a(26) =67108876a(27) =134479360a(28) =268435696a(29) =536870914