a(n)= A000265(3*(a(n-1)+a(n-2))/2 +1) starting at a(1)=1, a(2)=3.

Terms

a(0) =1a(1) =3a(2) =7a(3) =1a(4) =13a(5) =11a(6) =37a(7) =73a(8) =83a(9) =235a(10) =239a(11) =89a(12) =493a(13) =437a(14) =349a(15) =295a(16) =967a(17) =947a(18) =359a(19) =245a(20) =907a(21) =1729a(22) =3955a(23) =8527a(24) =4681a(25) =19813a(26) =18371a(27) =57277a(28) =113473a(29) =128063