A136866 Numbers k such that k and k^2 use only the digits 0, 1, 4 and 8.

0, 1, 10, 100, 1000, 10000, 10401, 100000, 104010, 1000000, 1004001, 1040100, 10000000, 10040010, 10401000, 100000000, 100040001, 100400100, 104010000, 1000000000, 1000400010, 1004001000, 1040100000, 10000000000, 10000400001, 10004000100, 10040010000, 10401000000, 100000000000, 100004000010, 100040001000, 100400100000

Offset

1,3

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..55

J. Wellons, Tables of Shared Digits [archived]

Example

100004040010401^2 = 10000808018401884040188180801.

Mathematica

With[{c={0, 1, 4, 8}}, Select[FromDigits/@Tuples[c, 12], SubsetQ[ c, IntegerDigits[ #^2]]&]] (* Harvey P. Dale, Oct 06 2020 *)

Crossrefs

Sequence in context: A190016 A115796 A136857 * A136878 A136871 A135653

Adjacent sequences: A136863 A136864 A136865 * A136867 A136868 A136869

Keyword

base,nonn

Author

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

Status

approved