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A028990 Largest palindromic prime with 2n+1 digits. 1
7, 929, 98689, 9989899, 999727999, 99999199999, 9999987899999, 999999787999999, 99999999299999999, 9999999992999999999, 999999999757999999999, 99999999997579999999999 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..11.

P. De Geest, World!Of Palindromic Primes

CROSSREFS

Sequence in context: A252175 A038808 A068728 * A304396 A151579 A024098

Adjacent sequences:  A028987 A028988 A028989 * A028991 A028992 A028993

KEYWORD

nonn,base

AUTHOR

Patrick De Geest

STATUS

approved

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Last modified July 12 22:46 EDT 2020. Contains 335669 sequences. (Running on oeis4.)