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A121233
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Palindromes whose ten's complements are squares.
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0
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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)
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OFFSET
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1,2
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COMMENTS
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Known primes occurring in the sequence are 919, 1196911, 9173719 and 9329239.
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LINKS
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EXAMPLE
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424 is a term because it's palindromic and 10^3-424 = 576 = 24^2.
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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