Four-digit numbers that do not resolve to 6174 under the Kaprekar map (see A151949).

Terms

a(0) =1000a(1) =1011a(2) =1101a(3) =1110a(4) =1111a(5) =1112a(6) =1121a(7) =1211a(8) =1222a(9) =2111a(10) =2122a(11) =2212a(12) =2221a(13) =2222a(14) =2223a(15) =2232a(16) =2322a(17) =2333a(18) =3222a(19) =3233a(20) =3323a(21) =3332a(22) =3333a(23) =3334a(24) =3343a(25) =3433a(26) =3444a(27) =4333a(28) =4344a(29) =4434