Numbers k such that the binary expansion of 3^k has the same number of 0's and 1's.

Terms

a(0) =2a(1) =12a(2) =69a(3) =73a(4) =150a(5) =184a(6) =252a(7) =328a(8) =339a(9) =464a(10) =483a(11) =541a(12) =729a(13) =747a(14) =758a(15) =763a(16) =1014a(17) =1047a(18) =1090a(19) =1094a(20) =1158a(21) =1264a(22) =1359a(23) =1601a(24) =1679a(25) =1693a(26) =1698a(27) =1780a(28) =2368a(29) =2641