Numbers k such that digit sum of 3^k is a power of 3.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =9a(7) =10a(8) =11a(9) =13a(10) =16a(11) =17a(12) =21a(13) =27a(14) =31a(15) =35a(16) =36a(17) =39a(18) =114a(19) =119a(20) =973a(21) =1005a(22) =1010a(23) =1025a(24) =3006a(25) =3029a(26) =3040a(27) =9128a(28) =9215a(29) =9227