Positive numbers having the same set of digits in base 3 and base 7.

Terms

a(0) =1a(1) =2a(2) =51a(3) =63a(4) =99a(5) =105a(6) =345a(7) =351a(8) =357a(9) =358a(10) =359a(11) =401a(12) =406a(13) =441a(14) =442a(15) =443a(16) =449a(17) =457a(18) =687a(19) =693a(20) =694a(21) =695a(22) =702a(23) =735a(24) =736a(25) =737a(26) =749a(27) =785a(28) =791a(29) =2403