A136982 Numbers k such that k and k^2 use only the digits 1, 2, 3, 7 and 8.

1, 11, 111, 1311, 13311, 17811, 133311, 288311, 883811, 1333311, 1823111, 3373111, 13333311, 87828311, 88781311, 133333311, 178387811, 878133311, 888137811, 1333333311, 1372178311, 3337231311, 8881287811, 13183783111, 13333333311, 17712178811, 27781781311, 117183137811, 133333333311, 137373112811, 181138378811

Offset

1,2

Comments

Generated with DrScheme.

Links

Jonathan Wellons, Table of n, a(n) for n = 1..74

J. Wellons, Tables of Shared Digits [archived]

Example

137372787817811^2 = 18871282832837322287328831721.

Crossrefs

Sequence in context: A338679 A199764 A097177 * A083441 A261269 A031974

Adjacent sequences: A136979 A136980 A136981 * A136983 A136984 A136985

Keyword

base,nonn

Author

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

Status

approved