Numbers k such that 3k - 1 divides 3^k - 1.

Terms

a(0) =1a(1) =9a(2) =12a(3) =96a(4) =345a(5) =432a(6) =852a(7) =945a(8) =1452a(9) =2160a(10) =3480a(11) =3753a(12) =4800a(13) =6561a(14) =6984a(15) =13230a(16) =15840a(17) =17040a(18) =30210a(19) =31008a(20) =40320a(21) =43776a(22) =44352a(23) =44652a(24) =47628a(25) =55200a(26) =56940a(27) =60420a(28) =61065a(29) =69312