login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A053900 Numbers k such that k^2 contains only digits {1,4,8}. 2

%I #23 Mar 09 2024 18:23:55

%S 1,2,9,12,21,22,29,38,109,122,221,1191,20359,12017441,64352012,

%T 69362229,105741122,1347014779,10715008859,664190348029,940313186572,

%U 4263966676478,34479242283029,1055656895701022,2968363385585478

%N Numbers k such that k^2 contains only digits {1,4,8}.

%H Zhao Hui Du, <a href="/A053900/b053900.txt">Table of n, a(n) for n = 1..31</a>

%H Author?, <a href="http://web.archive.org/web/20080708203024/http://blue.kakiko.com/mmrmmr/htm/eqtn06.html">Source</a>(<a href="http://web.archive.org/web/20060426155831/http://blue.kakiko.com/mmrmmr/txt/eqtn06.txt">txt</a>)

%H Patrick De Geest, <a href="http://www.worldofnumbers.com/threedigits.htm">Squares containing at most three distinct digits, Index entries for related sequences</a>

%H H. Mishima, <a href="http://www.asahi-net.or.jp/~KC2H-MSM/mathland/math02/math0210.htm">Squares consisted of 3 different digits</a> [From _Max Alekseyev_, May 29 2009]

%Y Cf. A053901.

%K nonn,base

%O 1,2

%A _Patrick De Geest_, Mar 15 2000

%E More terms from C. Ronaldo (aga_new_ac(AT)hotmail.com), Jan 04 2005

%E Two more terms from _Jon E. Schoenfield_, Sep 03 2006

%E Further terms from Mishima's webpage added by _Max Alekseyev_, May 29 2009

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 02:16 EDT 2024. Contains 371264 sequences. (Running on oeis4.)