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 A104073 #10 Sep 08 2022 08:45:17 %S A104073 53,113,16433,262193,4194353,67108913, %T A104073 5846006549323611672814739330865132078623730171953, %U A104073 1496577676626844588240573268701473812127674924007473 %N A104073 Primes of the form 2^n+7^2. %C A104073 a(14) has 1187 decimal digits. - _Vincenzo Librandi_, Jul 19 2012 %H A104073 Vincenzo Librandi, <a href="/A104073/b104073.txt">Table of n, a(n) for n = 1..13</a> %t A104073 Select[Table[2^n+49,{n,0,400}],PrimeQ] (* _Vincenzo Librandi_, Jul 19 2012 *) %o A104073 (Magma) [ a: n in [0..250] | IsPrime(a) where a is 2^n+49]; // _Vincenzo Librandi_, Jul 19 2012 %K A104073 nonn %O A104073 1,1 %A A104073 _Roger L. Bagula_, Mar 02 2005