This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A301808 #9 Mar 27 2018 07:46:33 %S A301808 7,19,12503,40000000003, %T A301808 8203095294242440214580822436689504141944719346082430189179667864757469187 %N A301808 Primes of form 4*k^k + 3. %C A301808 The next term is too large to include. %F A301808 a(n) = 4*A301520(n+1)^A301520(n+1) + 3. %Y A301808 Primes of form b*k^k + b - 1: A216148 (b=2), this sequence (b=4). %Y A301808 Cf. A301520, A301641. %K A301808 nonn %O A301808 1,1 %A A301808 _Seiichi Manyama_, Mar 27 2018