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 A136944 Numbers k such that k and k^2 use only the digits 0, 3, 6, 7 and 9. 1
 0, 3, 6, 30, 60, 63, 300, 306, 600, 603, 630, 3000, 3006, 3060, 6000, 6003, 6030, 6300, 30000, 30006, 30060, 30600, 60000, 60003, 60030, 60300, 63000, 63037, 79603, 300000, 300006, 300060, 300600, 306000, 600000, 600003, 600030, 600300, 603000, 630000, 630370, 796030, 796076, 3000000, 3000006, 3000060, 3000600, 3006000, 3060000, 6000000, 6000003 (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..753 J. Wellons, Tables of Shared Digits EXAMPLE 969067076796376^2 = 939090999330673300067366733376. MATHEMATICA With[{ss={0, 3, 6, 7, 9}}, Select[FromDigits/@Tuples[ss, 7], SubsetQ[ ss, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, May 29 2016 *) CROSSREFS Sequence in context: A260906 A136894 A136939 * A136946 A125521 A211168 Adjacent sequences: A136941 A136942 A136943 * A136945 A136946 A136947 KEYWORD base,nonn AUTHOR Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008 STATUS approved

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Last modified December 7 18:28 EST 2023. Contains 367660 sequences. (Running on oeis4.)