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 A136897 Numbers k such that k and k^2 use only the digits 0, 2, 4 and 5. 1
 0, 2, 5, 20, 45, 50, 200, 205, 450, 500, 502, 505, 2000, 2005, 2050, 2245, 4500, 5000, 5002, 5005, 5020, 5045, 5050, 20000, 20005, 20050, 20500, 20505, 22450, 45000, 45005, 50000, 50002, 50005, 50020, 50045, 50050, 50200, 50205, 50450, 50500, 50502, 200000, 200005, 200050, 200500, 200505, 205000, 205050, 224500, 450000, 450005, 450045, 450050 (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..1179 J. Wellons, Tables of Shared Digits EXAMPLE 505524500450^2 = 255555020555222050202500. MATHEMATICA Module[{c={0, 2, 4, 5}}, Select[FromDigits/@Tuples[c, 6], SubsetQ[c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Jul 30 2015 *) CROSSREFS Sequence in context: A136899 A136882 A136901 * A098510 A168541 A124264 Adjacent sequences: A136894 A136895 A136896 * A136898 A136899 A136900 KEYWORD base,nonn AUTHOR Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008 STATUS approved

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Last modified June 10 11:18 EDT 2023. Contains 363205 sequences. (Running on oeis4.)