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

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A136819 Numbers n such that n and the square of n use only the digits 0, 1, 2, 4 and 7. 1
0, 1, 2, 10, 11, 12, 20, 21, 100, 101, 102, 110, 120, 200, 201, 210, 421, 1000, 1001, 1002, 1010, 1011, 1012, 1020, 1021, 1071, 1100, 1101, 1102, 1200, 1201, 2000, 2001, 2010, 2011, 2100, 2101, 4210, 10000, 10001, 10002, 10010, 10011, 10012, 10020, 10021, 10100, 10110, 10120, 10200, 10210, 10710, 11000, 11001, 11002, 11010, 11011, 11020, 12000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Generated with DrScheme

LINKS

Jonathan Wellons, Table of n, a(n) for n=1..1154

J. Wellons, Tables of Shared Digits

EXAMPLE

4702140701^2 = 22110127172000771401

CROSSREFS

Sequence in context: A136810 A136821 A105116 * A136816 A188264 A169683

Adjacent sequences:  A136816 A136817 A136818 * A136820 A136821 A136822

KEYWORD

base,nonn

AUTHOR

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

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy .

Last modified December 5 11:35 EST 2016. Contains 278763 sequences.