Numbers having four 2's in base 4.

Terms

a(0) =170a(1) =426a(2) =554a(3) =618a(4) =650a(5) =666a(6) =674a(7) =678a(8) =680a(9) =681a(10) =683a(11) =686a(12) =698a(13) =746a(14) =938a(15) =1194a(16) =1450a(17) =1578a(18) =1642a(19) =1674a(20) =1690a(21) =1698a(22) =1702a(23) =1704a(24) =1705a(25) =1707a(26) =1710a(27) =1722a(28) =1770a(29) =1962