Numbers whose base-4 representation has the same nonzero number of 0's and 2's.

Terms

a(0) =8a(1) =18a(2) =24a(3) =33a(4) =35a(5) =36a(6) =44a(7) =50a(8) =56a(9) =70a(10) =73a(11) =75a(12) =78a(13) =82a(14) =88a(15) =97a(16) =99a(17) =100a(18) =108a(19) =114a(20) =120a(21) =130a(22) =133a(23) =135a(24) =136a(25) =141a(26) =143a(27) =145a(28) =147a(29) =148