The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A137060 Numbers k such that k and k^2 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 27 22:05 EDT 2023. Contains 362989 sequences. (Running on oeis4.)