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A137060 Numbers n such that n and the square of n use only the digits 1, 5, 6, 7 and 8. 1
1, 76, 81, 766, 816, 881, 7181, 7666, 71881, 76666, 81681, 81766, 88181, 88776, 766666, 767181, 817666, 817776, 876766, 7666666, 7866881, 8115766, 8176666, 76666666, 81766666, 81767181, 87617166, 87857166, 88157181, 88761881, 766587576, 766658716, 766658776, 766666666, 767187576, 785187166, 811657666, 811711881, 816156766 (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..187

J. Wellons, Tables of Shared Digits

EXAMPLE

876861765716681^2 = 768886556175775558717561655761

MATHEMATICA

With[{c={1, 5, 6, 7, 8}}, Select[Flatten[Table[FromDigits/@Tuples[c, n], {n, 9}]], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Nov 15 2018 *)

CROSSREFS

Sequence in context: A031321 A095599 A095587 * A095573 A095559 A095545

Adjacent sequences:  A137057 A137058 A137059 * A137061 A137062 A137063

KEYWORD

base,nonn

AUTHOR

Jonathan Wellons (wellons(AT)gmail.com), Jan 22 2008

STATUS

approved

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Last modified September 25 10:05 EDT 2020. Contains 337337 sequences. (Running on oeis4.)