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A083457 Smallest nontrivial k such that k^n - 1 is a palindrome (k >1 for n>1). +0
2
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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