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

1,1

Comments

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

Links

Table of n, a(n) for n=1..26.

Prog

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

Crossrefs

Cf. A155148, A155150.

Sequence in context: A031363 A118142 A193584 * A024821 A059610 A341783

Adjacent sequences: A155146 A155147 A155148 * A155150 A155151 A155152

Keyword

nonn,base,more

Author

Dmitry Kamenetsky, Jan 21 2009

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

Status

approved