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A137029
Numbers k such that k and k^2 use only the digits 1, 3, 4, 7 and 9.
1
1, 3, 7, 19479, 134143, 379143, 439479, 971479, 1199143, 37917979, 97339479, 199434143, 314917979, 413934143, 443979479, 974379143, 1191399143, 1979379143, 3799934143, 4439979479, 13943149479, 34317917979, 199949471479, 3119999114479, 3791347379143, 4139944979479, 4379419449479, 4447177949143, 9997174339479
OFFSET
1,2
COMMENTS
Generated with DrScheme.
LINKS
J. Wellons, Tables of Shared Digits [archived]
EXAMPLE
141399141934143^2 = 19993717339711917414949144449.
CROSSREFS
Sequence in context: A372769 A306632 A083461 * A174307 A351848 A137125
KEYWORD
base,nonn
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved