id:A117772 - OEIS Search Results

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Total number of palindromic primes in base 2 below 2^n.

+0
1

0, 1, 3, 3, 5, 5, 8, 8, 11, 11, 18, 18, 30, 30, 53, 53, 93, 93, 187, 187, 329, 329 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Every palindrome with an even number of digits is divisible by 11 (in base 2) and therefore is composite (not prime). Hence there is only one palindromic prime with an even number of digits.`
	LINKS	`Eric Weisstein: Palindromic Prime.`
	CROSSREFS	`Cf. A016041, A117697.` `Sequence in context: A051593 A046200 A063281 this_sequence A026924 A062130 A049644` `Adjacent sequences: A117769 A117770 A117771 this_sequence A117773 A117774 A117775`
	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.