A137147 - OEIS

%I #13 Apr 12 2024 09:51:27

%S 76,87,766,887,7666,8887,9786,76587,76666,87576,759576,766666,869866,

%T 869867,886886,888587,988866,7666666,8766867,8885887,76587576,

%U 76666666,76789686,86998666,87565786,87685676,88766867,97759786,97957576,766666666,875765766,886885887,887579686,977699687

%N Numbers k such that k and k^2 use only the digits 5, 6, 7, 8 and 9.

%C Generated with DrScheme.

%H Jonathan Wellons, <a href="/A137147/b137147.txt">Table of n, a(n) for n = 1..183</a>

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

%H <a href="/index/Sq#squares">OEIS Index to sequences related to squares</a>.

%e 989878759589576^2 = 979859958686597599779967859776.

%Y Cf. A136808, A136809, ..., A137146 for other digit combinations.

%Y Cf. A000290 (the squares); A027675, A058411, ..., A058474 (3-digit combinations).

%Y Cf. A277959, A277960, A277961, A295005, ..., A295009 (squares with largest digit = 2, 3, 4, 5, ..., 9).

%K base,nonn

%O 1,1

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