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 A137117 Numbers n such that n and the square of n use only the digits 2, 5, 7 and 9. 0
 5, 27, 77, 527, 7227, 27797977 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Generated with DrScheme No further terms up to 10^12. - Harvey P. Dale, Oct 02 2017 LINKS J. Wellons, Tables of Shared Digits EXAMPLE 27797977^2 = 772727525292529 MATHEMATICA With[{c={2, 5, 7, 9}}, Table[Select[FromDigits/@Tuples[c, n], SubsetQ[c, IntegerDigits[ #^2]]&], {n, 8}]]//Flatten (* Harvey P. Dale, Oct 02 2017 *) CROSSREFS Sequence in context: A048712 A121876 A137116 * A064675 A135713 A085740 Adjacent sequences:  A137114 A137115 A137116 * A137118 A137119 A137120 KEYWORD base,nonn AUTHOR Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008 STATUS approved

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Last modified December 7 17:41 EST 2019. Contains 329847 sequences. (Running on oeis4.)