A136833 Numbers k such that k and k^2 use only the digits 0, 1, 2, 7 and 9.

0, 1, 10, 11, 27, 100, 101, 110, 270, 1000, 1001, 1010, 1011, 1100, 1101, 1127, 2700, 2777, 10000, 10001, 10010, 10011, 10100, 10110, 11000, 11001, 11010, 11270, 11277, 27000, 27770, 100000, 100001, 100010, 100011, 100100, 100101, 100110, 101000, 101001, 101100, 110000, 110001, 110010, 110100, 112700, 112770, 270000, 277700, 1000000, 1000001

Offset

1,3

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..1104

J. Wellons, Tables of Shared Digits [archived]

Example

27017997921797^2 = 729972211702227010927709209.

Crossrefs

Sequence in context: A082517 A300376 A136828 * A355631 A056067 A300678

Adjacent sequences: A136830 A136831 A136832 * A136834 A136835 A136836

Keyword

base,nonn

Author

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

Status

approved