%I

%S 13,1021,12497,3294169,1365711509456878229586586894333

%N Primes of form 4*k^k - 3.

%C The next term is too large to include.

%F a(n) = 4*A301521(n)^A301521(n) - 3.

%Y Cf. A301521, A301641, A301808.

%K nonn

%O 1,1

%A _Seiichi Manyama_, Mar 28 2018