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 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 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

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