Numbers of the form 6^j + 7^k, for j and k >= 0.

Terms

a(0) =2a(1) =7a(2) =8a(3) =13a(4) =37a(5) =43a(6) =50a(7) =55a(8) =85a(9) =217a(10) =223a(11) =265a(12) =344a(13) =349a(14) =379a(15) =559a(16) =1297a(17) =1303a(18) =1345a(19) =1639a(20) =2402a(21) =2407a(22) =2437a(23) =2617a(24) =3697a(25) =7777a(26) =7783a(27) =7825a(28) =8119a(29) =10177