A155149 Numbers k such that k^4 has exactly 3 different decimal digits.

4, 5, 9, 11, 16, 20, 30, 34, 200, 300, 2000, 3000, 20000, 30000, 200000, 300000, 2000000, 3000000, 20000000, 30000000, 200000000, 300000000, 2000000000, 3000000000, 20000000000, 30000000000

Offset: 1

Author

Dmitry Kamenetsky, Jan 21 2009

Keywords

• nonn
• base
• more

Comments

Are there any more terms not of the form k * 10^n for k in {2, 3}?

Crossrefs

Cf. A155148, A155150.

Programs

Python

A155149_list = [n for n in range(1,10**6) if len(set(str(n**4))) == 3]
# Chai Wah Wu, Sep 27 2014

Extensions

Comment and more terms from Charles R Greathouse IV, Nov 12 2010

a(21)-a(22) from Chai Wah Wu, Sep 27 2014

a(23)-a(26) from Michael S. Branicky, Jun 28 2023