id:A117857 - OEIS Search Results

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Number of palindromes of length n (in base 5).

+0
1

4, 4, 20, 20, 100, 100, 500, 500, 2500, 2500, 12500, 12500 (list; graph; listen)

	OFFSET	`1,1`
	FORMULA	`a(n) = 4*5^floor((n-1)/2)`
	CROSSREFS	`Cf. A050683.` `Sequence in context: A133039 A035413 A087213 this_sequence A052923 A014433 A072696` `Adjacent sequences: A117854 A117855 A117856 this_sequence A117858 A117859 A117860`
	KEYWORD	`nonn`
	AUTHOR	`Martin Renner (martin.renner(AT)gmx.net), May 02 2006`

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