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A136926
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Numbers k such that k and k^2 use only the digits 0, 2, 7 and 9.
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0
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0, 27, 270, 2700, 27000, 270000, 2700000, 27000000, 270000000, 2700000000, 27000000000, 270000000000, 2700000000000, 27000000000000, 270000000000000, 2700000000000000, 27000000000000000, 270000000000000000, 2700000000000000000, 27000000000000000000
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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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270000000000000^2 = 72900000000000000000000000000.
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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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EXTENSIONS
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STATUS
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approved
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