Numbers whose base-6 and base-7 expansions have no digits in common.

Terms

a(0) =6a(1) =12a(2) =18a(3) =19a(4) =24a(5) =26a(6) =30a(7) =31a(8) =32a(9) =37a(10) =38a(11) =39a(12) =40a(13) =48a(14) =74a(15) =76a(16) =90a(17) =92a(18) =95a(19) =96a(20) =111a(21) =113a(22) =114a(23) =117a(24) =118a(25) =133a(26) =135a(27) =141a(28) =142a(29) =145