A137025 - OEIS

A137025

Numbers k such that k and k^2 use only the digits 1, 3, 4, 6 and 7.

1, 4, 6, 131, 371, 376, 644, 646, 1146, 1771, 3371, 3431, 6146, 11731, 33431, 41731, 61346, 61431, 64631, 116776, 376346, 416431, 641376, 643146, 664631, 3336731, 3337131, 3341771, 3363646, 3371376, 4144474, 6113376, 6113646, 6616376, 6643376, 6644346, 33336731, 33711146, 33714631, 34316376, 117374474, 177136776, 333366431, 333371376

(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..227

J. Wellons, Tables of Shared Digits [archived]

EXAMPLE

643763634136146^2 = 414431616636177643447663733316.

CROSSREFS

Sequence in context: A375697 A377719 A377688 * A375689 A377438 A355232

Adjacent sequences: A137022 A137023 A137024 * A137026 A137027 A137028

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved