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 A137005 Numbers k such that k and k^2 use only the digits 1, 2, 5, 6 and 8. 2
 1, 5, 11, 15, 16, 25, 81, 125, 261, 285, 511, 515, 516, 816, 1125, 1285, 1585, 2261, 2285, 2581, 2585, 5125, 11211, 12511, 12515, 12581, 25525, 25615, 26125, 28615, 28665, 51211, 81125, 81585, 112166, 125125, 158816, 256615, 258125, 261125, 261881, 285515, 515615, 811516, 828665, 1118865, 1585125, 1681125, 2261125, 2285216, 5162515, 5185125 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Generated with DrScheme. LINKS Jonathan Wellons, Table of n, a(n) for n = 1..435 J. Wellons, Tables of Shared Digits EXAMPLE 828652861686516^2 = 686665565181252216515856218256. MATHEMATICA With[{c={1, 2, 5, 6, 8}}, Select[Flatten[Table[FromDigits/@Tuples[c, n], {n, 7}]], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Apr 16 2015 *) CROSSREFS Sequence in context: A213444 A314002 A137004 * A137006 A137003 A314003 Adjacent sequences:  A137002 A137003 A137004 * A137006 A137007 A137008 KEYWORD base,nonn AUTHOR Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008 STATUS approved

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Last modified December 1 16:44 EST 2021. Contains 349430 sequences. (Running on oeis4.)