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A137115
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Numbers k such that k and k^2 use only the digits 2, 5, 6 and 9.
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0
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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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22955665^2 = 526962555592225.
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MATHEMATICA
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With[{c={2, 5, 6, 9}}, Select[Flatten[Table[FromDigits/@Tuples[c, n], {n, 9}]], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Mar 12 2018 *)
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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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