No more terms up to n=7600. The value corresponding to 4083 was certified prime with WinPFGW.
Table of n, a(n) for n=1..17.
(PARI) is(n)=ispseudoprime(1+5*10^n+100^n) \\ Charles R Greathouse IV, Jun 13 2017
Sequence in context: A097684 A277289 A218347 * A291607 A092752 A152603
Adjacent sequences: A171408 A171409 A171410 * A171412 A171413 A171414
Jason Earls, Dec 08 2009