Numbers having four 2's in base 10.

Terms

a(0) =2222a(1) =12222a(2) =20222a(3) =21222a(4) =22022a(5) =22122a(6) =22202a(7) =22212a(8) =22220a(9) =22221a(10) =22223a(11) =22224a(12) =22225a(13) =22226a(14) =22227a(15) =22228a(16) =22229a(17) =22232a(18) =22242a(19) =22252a(20) =22262a(21) =22272a(22) =22282a(23) =22292a(24) =22322a(25) =22422a(26) =22522a(27) =22622a(28) =22722a(29) =22822