Sums of two powers of 6.

Terms

a(0) =2a(1) =7a(2) =12a(3) =37a(4) =42a(5) =72a(6) =217a(7) =222a(8) =252a(9) =432a(10) =1297a(11) =1302a(12) =1332a(13) =1512a(14) =2592a(15) =7777a(16) =7782a(17) =7812a(18) =7992a(19) =9072a(20) =15552a(21) =46657a(22) =46662a(23) =46692a(24) =46872a(25) =47952a(26) =54432a(27) =93312a(28) =279937a(29) =279942