Numbers whose base-10 representation has the same nonzero number of 6's and 8's.

Terms

a(0) =68a(1) =86a(2) =168a(3) =186a(4) =268a(5) =286a(6) =368a(7) =386a(8) =468a(9) =486a(10) =568a(11) =586a(12) =608a(13) =618a(14) =628a(15) =638a(16) =648a(17) =658a(18) =678a(19) =680a(20) =681a(21) =682a(22) =683a(23) =684a(24) =685a(25) =687a(26) =689a(27) =698a(28) =768a(29) =786