login
This site is supported by donations to The OEIS Foundation.

 

Logo

Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A137075 Numbers n such that n and the square of n use only the digits 2, 3, 4, 7 and 9. 1

%I

%S 2,3,7,27,223,473,4943,49777,222327,273393,477277,499423,499473,

%T 973393,2733943,4932923,4993443,4994777,4997927,49342927,49924277,

%U 49972927,49993443,49994223,49994777,97339223,492942927,494342927,497332327,497794473,497993923,499293443,499932923,499947327,499972927,499979277,499979327

%N Numbers n such that n and the square of n use only the digits 2, 3, 4, 7 and 9.

%C Generated with DrScheme

%H Jonathan Wellons, <a href="/A137075/b137075.txt">Table of n, a(n) for n=1..200</a>

%H J. Wellons, <a href="http://jonathanwellons.com/shared-digits/">Tables of Shared Digits</a>

%e 497242372972927^2 = 247249977479747443472274947329

%K base,nonn

%O 1,1

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

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

Content is available under The OEIS End-User License Agreement .

Last modified August 23 03:34 EDT 2014. Contains 245976 sequences.