A155147 Numbers k such that k^3 has exactly 4 different digits.

12, 13, 16, 17, 18, 19, 21, 23, 25, 26, 28, 31, 33, 34, 37, 39, 42, 43, 44, 45, 46, 50, 53, 56, 58, 60, 64, 67, 68, 74, 77, 78, 79, 80, 81, 83, 86, 90, 91, 95, 98, 99, 106, 111, 114, 117, 121, 122, 132, 140, 142, 146, 150, 157, 160, 163, 164, 171, 172, 175, 177, 179

Offset: 1

Author

Dmitry Kamenetsky, Jan 21 2009

Keywords

• nonn
• base

Links

• John Cerkan, Table of n, a(n) for n = 1..1006

Crossrefs

Cf. A155146.

Programs

Maple

a := proc (n) if nops(convert(convert(n^3, base, 10), set)) = 4 then n else end if end proc: seq(a(n), n = 1 .. 220); # Emeric Deutsch, Jan 26 2009

Extensions

Extended by Emeric Deutsch, Jan 26 2009