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A137130
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Numbers k such that k and k^2 use only the digits 3, 4, 7, 8 and 9.
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1
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3, 7, 88, 893, 938, 8933, 8938, 98933, 894393, 939938, 988933, 989333, 993878, 9374833, 9873438, 9973933, 93749333, 94788438, 99744393, 879394393, 888444933, 943344833, 943397978, 987389933, 988933438, 989948933, 999439788, 8794793788, 8797384833, 9379498333, 9433898438, 9478783933, 9949748438, 9993739933, 9994497378, 9998944833
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OFFSET
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1,1
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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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998738373898978^2 = 997478339498374779973749444484.
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CROSSREFS
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KEYWORD
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base,nonn,changed
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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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