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%I #15 Jul 12 2018 11:26:04
%S 0,6,12,3804,8346,15528,147036
%N Numbers k such that 4^k + k^4 + 1 is prime.
%C a(8) > 2*10^5. - _Robert Price_, Apr 29 2014
%C a(1)-a(3) are trivially prime. a(4)-a(7) are probable primes. - _Robert Price_, May 07 2014
%t Select[Range[0, 5000], PrimeQ[4^# + #^4 + 1] &]
%o (PARI) is(n)=ispseudoprime(4^n+n^4+1) \\ _Charles R Greathouse IV_, Jun 06 2017
%Y Cf. A100357, A215434-A215446, A216375.
%K nonn
%O 1,2
%A _Vincenzo Librandi_, Sep 07 2012
%E a(5)-a(7) from _Robert Price_, Apr 29 2014
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