A136991 - OEIS

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

%S 1,2,5,11,12,15,21,112,211,212,229,1515,4415,4421,95512,119229,119415,

%T 145415,221911,222511,222515,222521,442212,459521,491421,494211,

%U 494421,494511,499229,499521,1222515,1245911,1594415,2119415,4942212,4944211,4951911,4955229,4991515,4994421,4995212,11145511,11155515,11925415,12212511

%N Numbers k such that k and k^2 use only the digits 1, 2, 4, 5 and 9.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A136991/b136991.txt">Table of n, a(n) for n = 1..367</a>

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

%e 492149521242421^2 = 242211151259144199119449941241.

%K base,nonn

%O 1,2

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