A136825 Numbers k such that k and k^2 use only the digits 0, 1, 2, 5 and 8.

0, 1, 5, 10, 11, 15, 50, 100, 101, 105, 110, 150, 151, 285, 500, 501, 505, 1000, 1001, 1005, 1010, 1011, 1050, 1100, 1101, 1105, 1500, 1510, 1585, 2255, 2285, 2850, 2851, 2855, 5000, 5001, 5005, 5010, 5011, 5015, 5050, 10000, 10001, 10005, 10010, 10011, 10050, 10100, 10105, 10110, 10500, 11000, 11001, 11005, 11010, 11050, 11205, 12255, 15000, 15005

Offset: 1

Author

Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008

Keywords

• base
• nonn

Comments

Generated with DrScheme.

Examples

			508018515^2 = 258082811582805225.
		

Links

• Jonathan Wellons, Table of n, a(n) for n = 1..1064
• J. Wellons, Tables of Shared Digits [archived]

Programs

Mathematica

With[{c={0,1,2,5,8}},Select[FromDigits/@Tuples[c,5],SubsetQ[ c,IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Oct 02 2021 *)