A136947 - OEIS

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

%S 0,3,30,300,3000,30000,300000,989803,3000000,8370783,9889783,9898030,

%T 30000000,83707830,88830783,89330333,89380833,89909833,93803033,

%U 98897830,98980300,300000000,837078300,878003303,888307830,893303330,893808330,893889803,899098330,938030330,988978300,989803000,998998003,3000000000

%N Numbers k such that k and k^2 use only the digits 0, 3, 7, 8 and 9.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A136947/b136947.txt">Table of n, a(n) for n = 1..297</a>

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

%e 998903093797083^2 = 997807390797383997790779308889.

%K base,nonn

%O 1,2

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