A136948 Numbers k such that k and k^2 use only the digits 0, 4, 5, 6 and 7.

0, 74, 76, 740, 760, 7400, 7600, 74000, 74476, 76000, 77766, 667574, 740000, 744760, 757666, 760000, 777660, 777666, 6675740, 7075076, 7400000, 7447600, 7576660, 7600000, 7776600, 7776660, 66757400, 67577766, 67607474, 70750760, 74000000, 74474476, 74476000, 74476574, 75765474, 75766600, 76000000, 77750074, 77766000, 77766600, 667574000

Offset: 1

Author

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

Keywords

• base
• nonn

Comments

Generated with DrScheme.

Examples

			676577456545476^2 = 457757054705545465075656066576.
		

Links

• Jonathan Wellons, Table of n, a(n) for n = 1..306
• J. Wellons, Tables of Shared Digits [archived]