1 followed by the union of the terms > 2 in A002387 (or A004080) and A115515.

Terms

a(0) =1a(1) =3a(2) =4a(3) =10a(4) =11a(5) =30a(6) =31a(7) =82a(8) =83a(9) =226a(10) =227a(11) =615a(12) =616a(13) =1673a(14) =1674a(15) =4549a(16) =4550a(17) =12366a(18) =12367a(19) =33616a(20) =33617a(21) =91379a(22) =91380a(23) =248396a(24) =248397a(25) =675213a(26) =675214a(27) =1835420a(28) =1835421a(29) =4989190