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A137064 Numbers n such that n and the square of n use only the digits 1, 6, 7 and 8. 0
1, 881, 88776, 7866881 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Generated with DrScheme

No additional terms through 10^10. - Harvey P. Dale, Apr 26 2015

LINKS

Table of n, a(n) for n=1..4.

J. Wellons, Tables of Shared Digits

EXAMPLE

7866881^2 = 61887816668161

MATHEMATICA

With[{c={1, 6, 7, 8}}, Select[Flatten[Table[FromDigits/@Tuples[c, n], {n, 7}]], SubsetQ[c, IntegerDigits[#^2]]&]] (* Harvey P. Dale, Apr 26 2015 *)

CROSSREFS

Sequence in context: A006052 A105976 A265181 * A092675 A135127 A230909

Adjacent sequences:  A137061 A137062 A137063 * A137065 A137066 A137067

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved

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Last modified July 20 20:57 EDT 2017. Contains 289629 sequences.