Numbers whose base-12 representation has the same nonzero number of 2's and 7's.

Terms

a(0) =31a(1) =86a(2) =175a(3) =230a(4) =295a(5) =307a(6) =331a(7) =343a(8) =355a(9) =367a(10) =372a(11) =373a(12) =375a(13) =376a(14) =377a(15) =378a(16) =380a(17) =381a(18) =382a(19) =383a(20) =391a(21) =403a(22) =415a(23) =427a(24) =463a(25) =518a(26) =607a(27) =662a(28) =751a(29) =806