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A137012
Numbers k such that k and k^2 use only the digits 1, 2, 5 and 9.
0
1, 5, 11, 15, 1515
OFFSET
1,2
COMMENTS
Generated with DrScheme.
LINKS
EXAMPLE
1515^2 = 2295225.
CROSSREFS
Sequence in context: A137008 A137010 A137007 * A259067 A314080 A337947
KEYWORD
base,nonn,more
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved