Numbers whose base-8 representation has the same nonzero number of 2's and 5's.

Terms

a(0) =21a(1) =42a(2) =85a(3) =106a(4) =133a(5) =141a(6) =157a(7) =165a(8) =168a(9) =169a(10) =171a(11) =172a(12) =174a(13) =175a(14) =181a(15) =189a(16) =213a(17) =234a(18) =277a(19) =298a(20) =322a(21) =330a(22) =336a(23) =337a(24) =339a(25) =340a(26) =342a(27) =343a(28) =346a(29) =354