a(n) = A085956(3n+1).

Terms

a(0) =5a(1) =17a(2) =239a(3) =41a(4) =131a(5) =1889a(6) =419a(7) =89a(8) =101a(9) =113a(10) =2543a(11) =2789a(12) =149a(13) =881a(14) =173a(15) =9293a(16) =491a(17) =14249a(18) =3191a(19) =1973a(20) =3539a(21) =21377a(22) =7103a(23) =281a(24) =5987a(25) =38153a(26) =317a(27) =2789a(28) =6971a(29) =353