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A137068 Numbers k such that k and k^2 use only the digits 2, 3, 4, 5 and 7. 1
2, 5, 235, 2335, 7235, 23335, 72335, 233335, 477235, 2333335, 2354235, 23333335, 47354235, 233333335, 235744235, 273372335, 274477235, 473732335, 723432335, 2333333335, 2333524235, 2733723335, 4747354235, 7372744235, 23333333335, 23333524235, 27472254235, 52224777235, 57223732335, 72334323335, 233333333335, 273372342335 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Generated with DrScheme.
LINKS
EXAMPLE
52323727254235^2 = 2737772433775574532325435225.
CROSSREFS
Sequence in context: A072118 A249180 A135724 * A137066 A175977 A367673
KEYWORD
base,nonn
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved

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Last modified March 29 08:53 EDT 2024. Contains 371268 sequences. (Running on oeis4.)