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A136842 Numbers k such that k and k^2 use only the digits 0, 1, 3 and 5. 1

%I #7 Apr 12 2024 09:51:26

%S 0,1,10,100,1000,10000,100000,550501,1000000,5505010,10000000,

%T 55050100,55055001,100000000,550501000,550550010,1000000000,

%U 1000550501,1005055001,5505010000,5505500100,10000000000,10005505010,10050550010,55050100000,55055001000,100000000000,100000550501,100055050100,100505500100

%N Numbers k such that k and k^2 use only the digits 0, 1, 3 and 5.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A136842/b136842.txt">Table of n, a(n) for n = 1..64</a>

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

%e 10000505005001^2 = 100010100355050051035010001.

%K base,nonn

%O 1,3

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

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Last modified September 9 19:47 EDT 2024. Contains 375765 sequences. (Running on oeis4.)