Exactly half of first n terms of A006928 are 1's (not known to be infinite).

Terms

a(0) =2a(1) =8a(2) =10a(3) =12a(4) =14a(5) =18a(6) =20a(7) =26a(8) =38a(9) =44a(10) =46a(11) =56a(12) =62a(13) =64a(14) =66a(15) =68a(16) =74a(17) =76a(18) =80a(19) =82a(20) =84a(21) =86a(22) =88a(23) =90a(24) =94a(25) =96a(26) =98a(27) =100a(28) =102a(29) =104