id:A117787 - OEIS Search Results

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Total number of palindromic primes in base 9 below 9^n.

+0
1

4, 4, 17, 17, 81, 81, 499, 499 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Every palindrome with an even number of digits is divisible by 11 (in base 9) and therefore is composite (not prime). Hence there is no palindromic prime with an even number of digits.`
	LINKS	`Eric Weisstein: Palindromic Prime.`
	CROSSREFS	`Cf. A029977, A117703.` `Sequence in context: A051460 A101407 A117785 this_sequence A113727 A116561 A086448` `Adjacent sequences: A117784 A117785 A117786 this_sequence A117788 A117789 A117790`
	KEYWORD	`nonn`
	AUTHOR	`Martin Renner (martin.renner(AT)gmx.net), Apr 15 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.