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A117786 Total number of palindromic primes in base 8 with n digits. 1
4, 0, 13, 0, 47, 0, 311, 0, 1944, 0, 12811, 0, 84424, 0, 575612, 0, 4078451, 0, 28998777, 0, 205852759, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Every palindrome with an even number of digits is divisible by 11 (in base 8) and therefore is composite (not prime). Hence there is no palindromic prime with an even number of digits.
LINKS
Eric Weisstein: Palindromic Prime.
CROSSREFS
Sequence in context: A137523 A369914 A291108 * A117788 A233398 A006710
KEYWORD
nonn,base
AUTHOR
Martin Renner, Apr 15 2006
EXTENSIONS
a(9)-a(22) from Chai Wah Wu, Dec 25 2015
STATUS
approved

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Last modified July 17 13:42 EDT 2024. Contains 374377 sequences. (Running on oeis4.)