a(n) is a binary encoded version of A356803(n).

Terms

a(0) =0a(1) =0a(2) =1a(3) =3a(4) =6a(5) =14a(6) =28a(7) =31a(8) =59a(9) =123a(10) =243a(11) =499a(12) =995a(13) =2019a(14) =2028a(15) =2045a(16) =4061a(17) =4095a(18) =8127a(19) =16319a(20) =32575a(21) =65343a(22) =130623a(23) =261695a(24) =523327a(25) =1047615a(26) =2095167a(27) =4192319a(28) =8386611a(29) =8386679