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 A136956 Numbers k such that k and k^2 use only the digits 0, 4, 6, 8 and 9. 1
 0, 8, 64, 80, 98, 640, 664, 800, 898, 980, 998, 6400, 6640, 6664, 8000, 8980, 8998, 9800, 9980, 9998, 64000, 66400, 66640, 66664, 80000, 89800, 89980, 89998, 98000, 98998, 99800, 99980, 99998, 640000, 664000, 664064, 666400, 666640, 666664, 684908, 800000, 806008, 896886, 898000, 899800, 899980, 899998, 980000, 989980, 989998, 990408, 998000 (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..1208 J. Wellons, Tables of Shared Digits EXAMPLE 984686089068008^2 = 969606694004048984086049088064. MATHEMATICA With[{c={0, 4, 6, 8, 9}}, Select[FromDigits/@Tuples[c, 6], SubsetQ[ c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Feb 04 2015 *) CROSSREFS Essentially the same as A107626. - R. J. Mathar, Feb 28 2009 Sequence in context: A043078 A037413 A107626 * A345946 A161146 A208380 Adjacent sequences:  A136953 A136954 A136955 * A136957 A136958 A136959 KEYWORD base,nonn AUTHOR Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008 STATUS approved

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Last modified July 4 17:09 EDT 2022. Contains 355081 sequences. (Running on oeis4.)