A083456 - OEIS

%I #7 Aug 23 2014 14:07:10

%S 1,2,2,5,2,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,

%T 10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,

%U 10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10

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

%C 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?

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

%K base,nonn

%O 1,2

%A _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 01 2003

%E More terms from _David Wasserman_, Nov 11 2004