Binary palindromic numbers with only one 0 bit.

Terms

a(0) =0a(1) =5a(2) =27a(3) =119a(4) =495a(5) =2015a(6) =8127a(7) =32639a(8) =130815a(9) =523775a(10) =2096127a(11) =8386559a(12) =33550335a(13) =134209535a(14) =536854527a(15) =2147450879a(16) =8589869055a(17) =34359607295a(18) =137438691327a(19) =549755289599