Simon Plouffe's conjectured extension of sequence A008368.

Terms

a(0) =1a(1) =1a(2) =3a(3) =4a(4) =7a(5) =8a(6) =13a(7) =14a(8) =20a(9) =22a(10) =29a(11) =31a(12) =40a(13) =42a(14) =52a(15) =55a(16) =66a(17) =69a(18) =82a(19) =85a(20) =99a(21) =103a(22) =118a(23) =122a(24) =139a(25) =143a(26) =161a(27) =166a(28) =185a(29) =190