a(n) = A003415(A019565(n)).

Terms

a(0) =0a(1) =1a(2) =1a(3) =5a(4) =1a(5) =7a(6) =8a(7) =31a(8) =1a(9) =9a(10) =10a(11) =41a(12) =12a(13) =59a(14) =71a(15) =247a(16) =1a(17) =13a(18) =14a(19) =61a(20) =16a(21) =87a(22) =103a(23) =371a(24) =18a(25) =113a(26) =131a(27) =493a(28) =167a(29) =719