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A136922
Numbers k such that k and k^2 use only the digits 0, 2, 6, 7 and 8.
1
0, 26, 260, 826, 2600, 8226, 8260, 26000, 82260, 82600, 260000, 280726, 822600, 826000, 2600000, 2767826, 2807260, 7786026, 8226000, 8260000, 26000000, 27678260, 28072600, 28686026, 77860260, 82260000, 82600000, 88672826, 260000000, 276782600, 277288226, 280726000, 286860260, 778602600, 787786026, 820260826, 822600000, 826000000
OFFSET
1,2
COMMENTS
Generated with DrScheme.
LINKS
J. Wellons, Tables of Shared Digits [archived]
EXAMPLE
876286270727826^2 = 767877628266080762027770686276.
MATHEMATICA
With[{gr={0, 2, 6, 7, 8}}, Select[FromDigits/@Tuples[gr, 9], SubsetQ[gr, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Aug 05 2015 *)
CROSSREFS
Sequence in context: A125389 A109467 A126547 * A136921 A042308 A251673
KEYWORD
base,nonn
AUTHOR
Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008
STATUS
approved