Numbers k such that k^4 has exactly 3 different decimal digits.

Terms

a(0) =4a(1) =5a(2) =9a(3) =11a(4) =16a(5) =20a(6) =30a(7) =34a(8) =200a(9) =300a(10) =2000a(11) =3000a(12) =20000a(13) =30000a(14) =200000a(15) =300000a(16) =2000000a(17) =3000000a(18) =20000000a(19) =30000000a(20) =200000000a(21) =300000000a(22) =2000000000a(23) =3000000000a(24) =20000000000a(25) =30000000000