A083456 Smallest nontrivial k such that k^n + 1 is a palindrome (k>1 for n>1).

1, 2, 2, 5, 2, 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

Offset

1,2

Comments

The sequence is infinite as 10 always qualifies to be a member. a(n) <= 10. Are there members not equal to 10 for n > 5?

Links

Table of n, a(n) for n=1..71.

Example

a(5) = 2 as 2^5 + 1 = 33 is a palindrome.

Crossrefs

Sequence in context: A266662 A289078 A051612 * A211932 A213642 A344753

Adjacent sequences: A083453 A083454 A083455 * A083457 A083458 A083459

Keyword

base,nonn

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 01 2003

Extensions

More terms from David Wasserman, Nov 11 2004

Status

approved