|
|
A136833
|
|
Numbers k such that k and k^2 use only the digits 0, 1, 2, 7 and 9.
|
|
1
|
|
|
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
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,3
|
|
COMMENTS
|
Generated with DrScheme.
|
|
LINKS
|
|
|
EXAMPLE
|
27017997921797^2 = 729972211702227010927709209.
|
|
CROSSREFS
|
|
|
KEYWORD
|
base,nonn
|
|
AUTHOR
|
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
|
|
STATUS
|
approved
|
|
|
|