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A137052
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Numbers k such that k and k^2 use only the digits 1, 4, 6, 7 and 8.
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1
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1, 4, 8, 41, 88, 881, 4141, 6441, 6846, 8478, 8641, 8874, 8878, 41771, 68181, 68474, 68678, 68878, 86478, 88776, 816771, 817181, 846846, 876178, 878488, 881178, 6417776, 6647441, 7866881, 8177678, 8466846, 8761776, 8841181, 41818474, 64168641, 64411776, 66466846, 66871881, 68444641, 81676874, 81768846, 84668641, 84668871, 86116878, 87617776
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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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874167467867678^2 = 764168761878187848616117111684.
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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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