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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A121233 Palindromes whose ten's complements are squares. 0
1, 6, 9, 99, 424, 676, 919, 999, 4224, 5775, 9559, 9999, 57975, 63136, 91719, 93439, 99999, 951159, 999999, 1196911, 4402044, 6359536, 6944496, 9173719, 9329239, 9959599, 9977799, 9999999, 67144176, 99188199, 99999999, 577080775, 915525519 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Known primes occuring in the sequence are 919, 1196911, 9173719 and 9329239.

LINKS

Table of n, a(n) for n=1..33.

EXAMPLE

424 is a term because it's palindromic and 10^3-424 = 576 = 24^2.

CROSSREFS

Sequence in context: A204383 A266006 A103107 * A156180 A191011 A053490

Adjacent sequences:  A121230 A121231 A121232 * A121234 A121235 A121236

KEYWORD

base,nonn

AUTHOR

Jason Earls, Aug 21 2006

EXTENSIONS

More terms from R. J. Mathar, Sep 02 2006

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 19 06:47 EDT 2019. Contains 324218 sequences. (Running on oeis4.)