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A137116
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Numbers k such that k and k^2 use only the digits 2, 5, 7, 8 and 9.
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2
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5, 27, 77, 85, 527, 727, 7227, 9777, 28277, 29585, 88277, 99277, 278527, 298827, 2788527, 2789227, 5289227, 8875727, 9889277, 22925527, 27797977, 29879585, 52898827, 85298827, 88875527, 99789227, 99988777, 278889277, 287279585, 292898827, 297875527, 299929585, 527252527, 528982977, 727528527, 727825527, 727925527, 988579585, 992587527
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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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727872928279585^2 = 529798999722297889227927772225.
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PROG
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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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