Positive numbers k such that k and 4*k are anagrams in base 7 (written in base 7).

Terms

a(0) =136a(1) =1254a(2) =1360a(3) =1366a(4) =1436a(5) =10234a(6) =10342a(7) =10452a(8) =12254a(9) =12540a(10) =12544a(11) =12654a(12) =13600a(13) =13624a(14) =13660a(15) =13666a(16) =14360a(17) =14366a(18) =14436a(19) =14562a(20) =100234a(21) =100342a(22) =100452a(23) =101543a(24) =102234a(25) =102340a(26) =102344a(27) =102434a(28) =103420a(29) =103422