Duplicate of A085587.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =2a(6) =7a(7) =1a(8) =7a(9) =6a(10) =31a(11) =4a(12) =63a(13) =14a(14) =15a(15) =1a(16) =15a(17) =14a(18) =511a(19) =12