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A136994 Numbers n such that n and the square of n use only the digits 1, 2, 4, 6 and 8. 1
1, 2, 4, 8, 11, 12, 21, 22, 41, 46, 68, 121, 122, 162, 168, 221, 261, 262, 642, 668, 1488, 4262, 6441, 6642, 6668, 8162, 8261, 11141, 11142, 14881, 66668, 81662, 121168, 148868, 248222, 248642, 664162, 664441, 666668, 684262, 828622, 1124662, 1188142, 1618222, 2118222, 2148122, 2148642, 4261668, 4628622, 6422182, 6644162, 6666668, 11142122 (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..442

J. Wellons, Tables of Shared Digits

EXAMPLE

681824624246168^2 = 464884818228428184142262684224

MATHEMATICA

With[{c={1, 2, 4, 6, 8}}, Table[Select[FromDigits/@Tuples[c, n], SubsetQ[ c, IntegerDigits[ #^2]]&], {n, 8}]]//Flatten (* Harvey P. Dale, Apr 13 2018 *)

CROSSREFS

Sequence in context: A028846 A274924 A080152 * A137288 A247524 A116443

Adjacent sequences:  A136991 A136992 A136993 * A136995 A136996 A136997

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved

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Last modified June 21 16:20 EDT 2021. Contains 345364 sequences. (Running on oeis4.)