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 A246516 #30 Sep 08 2022 08:46:09
%S A246516 2,7,549755813869,2475880078570760549798248403
%N A246516 Primes of the form 2*4^n - n.
%C A246516 a(5) and a(6) are 125 and 266 decimal digits long, respectively. - _Derek Orr_, Aug 28 2014
%e A246516 2*4^0 - 0 = 2 is prime, thus 2 is a member of this sequence.
%t A246516 Select[Table[2^(2n + 1) - n, {n, 0, 127}], PrimeQ] (* _Alonso del Arte_, Sep 16 2014 *)
%o A246516 (Magma) [a: n in [0..500] | IsPrime(a) where a is 2*4^n - n];
%o A246516 (PARI)
%o A246516 for(n=0,10^3,if(ispseudoprime(2^(2*n+1)-n),print1(2^(2*n+1)-n,", "))) \\ _Derek Orr_, Aug 28 2014
%Y A246516 Cf. A100362, A241861.
%K A246516 nonn
%O A246516 1,1
%A A246516 _Juri-Stepan Gerasimov_, Aug 28 2014