Interleaving of A002450(n), A002450(n) + 1.

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =5a(5) =6a(6) =21a(7) =22a(8) =85a(9) =86a(10) =341a(11) =342a(12) =1365a(13) =1366a(14) =5461a(15) =5462a(16) =21845a(17) =21846a(18) =87381a(19) =87382a(20) =349525a(21) =349526a(22) =1398101a(23) =1398102a(24) =5592405a(25) =5592406a(26) =22369621a(27) =22369622a(28) =89478485a(29) =89478486