a(n) = (s(n)-(n mod 2)) / n where s(n) is A006533.

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =3a(5) =5a(6) =8a(7) =11a(8) =18a(9) =23a(10) =35a(11) =38a(12) =61a(13) =69a(14) =98a(15) =107a(16) =148a(17) =138a(18) =213a(19) =226a(20) =295a(21) =311a(22) =396a(23) =377a(24) =518a(25) =539a(26) =663a(27) =686a(28) =833a(29) =717