A137043 - OEIS

%I #7 Apr 12 2024 09:51:27

%S 1,3,9,891,9891,13391,131833,197917,993891,1173833,1178891,1331833,

%T 1837917,1931833,13318333,13331833,19318333,117787917,133318333,

%U 193318333,199971833,879733891,1333183333,1333318333,1837878891,1933183333,1998333891,3737883333,8819398391,8879178891,9938913391,9999191833,13333183333

%N Numbers k such that k and k^2 use only the digits 1, 3, 7, 8 and 9.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A137043/b137043.txt">Table of n, a(n) for n = 1..114</a>

%H J. Wellons, <a href="https://web.archive.org/web/20090206165028/http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a> [archived]

%e 939783971871833^2 = 883193913787198199337778779889.

%K base,nonn

%O 1,2

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