id:A083457 - OEIS Search Results

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Smallest nontrivial k such that k^n - 1 is a palindrome (k >1 for n>1).

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1, 2, 2, 10, 3, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`The sequence is infinite as 10 always qualifies: 10^k - 1 is always a palindrome, hence a(n) <=10. Is there any n > 5 for which a(n) is not equal to 10?`
	EXAMPLE	`a(5) = 3 as 3^5 -1 = 242 is a palindrome.`
	CROSSREFS	`Cf. A083456.` `Sequence in context: A038036 A133631 A137450 this_sequence A127058 A094359 A135996` `Adjacent sequences: A083454 A083455 A083456 this_sequence A083458 A083459 A083460`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy and Meenakshi Srikanth (amarnath_murthy(AT)yahoo.com), May 01 2003`
	EXTENSIONS	`More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Nov 11 2004`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

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