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A137043
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Numbers k such that k and k^2 use only the digits 1, 3, 7, 8 and 9.
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1
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1, 3, 9, 891, 9891, 13391, 131833, 197917, 993891, 1173833, 1178891, 1331833, 1837917, 1931833, 13318333, 13331833, 19318333, 117787917, 133318333, 193318333, 199971833, 879733891, 1333183333, 1333318333, 1837878891, 1933183333, 1998333891, 3737883333, 8819398391, 8879178891, 9938913391, 9999191833, 13333183333
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OFFSET
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1,2
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COMMENTS
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Generated with DrScheme.
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LINKS
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EXAMPLE
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939783971871833^2 = 883193913787198199337778779889.
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
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STATUS
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approved
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