a(n) is smallest number larger than a(n-1) and not = a(j) + a(k), j < k.

Terms

a(0) =2a(1) =5a(2) =6a(3) =9a(4) =10a(5) =13a(6) =17a(7) =20a(8) =21a(9) =24a(10) =28a(11) =32a(12) =35a(13) =36a(14) =39a(15) =43a(16) =47a(17) =50a(18) =51a(19) =54a(20) =58a(21) =62a(22) =65a(23) =66a(24) =69a(25) =73a(26) =77a(27) =80a(28) =81a(29) =84