A137052 Numbers k such that k and k^2 use only the digits 1, 4, 6, 7 and 8.

1, 4, 8, 41, 88, 881, 4141, 6441, 6846, 8478, 8641, 8874, 8878, 41771, 68181, 68474, 68678, 68878, 86478, 88776, 816771, 817181, 846846, 876178, 878488, 881178, 6417776, 6647441, 7866881, 8177678, 8466846, 8761776, 8841181, 41818474, 64168641, 64411776, 66466846, 66871881, 68444641, 81676874, 81768846, 84668641, 84668871, 86116878, 87617776

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..299

J. Wellons, Tables of Shared Digits [archived]

Example

874167467867678^2 = 764168761878187848616117111684.

Crossrefs

Sequence in context: A165622 A162076 A137047 * A111411 A137054 A338423

Adjacent sequences: A137049 A137050 A137051 * A137053 A137054 A137055

Keyword

base,nonn

Author

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

Status

approved