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

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..306

J. Wellons, Tables of Shared Digits [archived]

Example

676577456545476^2 = 457757054705545465075656066576.

Crossrefs

Sequence in context: A114969 A104421 A352382 * A137139 A095569 A305265

Adjacent sequences: A136945 A136946 A136947 * A136949 A136950 A136951

Keyword

base,nonn,changed

Author

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

Status

approved