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A083457
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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
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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; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| 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?
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EXAMPLE
| a(5) = 3 as 3^5 -1 = 242 is a palindrome.
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CROSSREFS
| Cf. A083456.
Sequence in context: A133631 A137450 A163937 * A163808 A127058 A094359
Adjacent sequences: A083454 A083455 A083456 * A083458 A083459 A083460
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy and Meenakshi Srikanth (amarnath_murthy(AT)yahoo.com), May 01 2003
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EXTENSIONS
| More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Nov 11 2004
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