%I

%S 0,3,10,22,59,84

%N Numbers n such that (10^n)^4+(10^n+1)^4 is prime.

%C No more terms up to n=4200.

%H Prime Curio, <a href="http://primes.utm.edu/curios/page.php?number_id=4781">200..400..600..400..1</a>

%o (PARI) is(n)=ispseudoprime((10^n)^4+(10^n+1)^4) \\ _Charles R Greathouse IV_, Jun 13 2017

%K more,nonn

%O 1,2

%A _Jason Earls_, Dec 15 2009