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 A224451 #14 Mar 12 2024 02:40:48
%S A224451 3,61,1019,1180591620717411303389,
%T A224451 1569275433846670190958947355801916604025588861116008628129
%N A224451 Primes of the form 4^n - n.
%C A224451 Corresponding n are given in A057908.
%C A224451 The next term has 797 digits. - _Harvey P. Dale_, Mar 16 2015
%t A224451 Select[Table[4^n-n,{n,200}],PrimeQ] (* _Harvey P. Dale_, Mar 16 2015 *)
%Y A224451 Cf. A057908 (n such that 4^n - n is prime).
%Y A224451 Cf. A024037, A129963, A224420.
%K A224451 nonn
%O A224451 1,1
%A A224451 _Alex Ratushnyak_, Apr 06 2013