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!)
A136915 Numbers k such that k and k^2 use only the digits 0, 2, 5 and 7. 1
0, 5, 50, 500, 505, 755, 5000, 5005, 5050, 7550, 50000, 50005, 50050, 50500, 50505, 75500, 500000, 500005, 500050, 500500, 500505, 500755, 505000, 505050, 755000, 5000000, 5000005, 5000050, 5000500, 5000505, 5000755, 5005000, 5005005, 5005050, 5007550, 5025505, 5050000, 5050005, 5050500, 7550000, 7550005, 50000000, 50000005, 50000050 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Generated with DrScheme.
LINKS
J. Wellons, Tables of Shared Digits [archived]
EXAMPLE
505050250050005^2 = 255075755075572575505000500025.
CROSSREFS
Sequence in context: A266028 A228751 A299868 * A136918 A136910 A267663
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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 22 01:41 EDT 2024. Contains 373561 sequences. (Running on oeis4.)