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 A241676 #13 Sep 08 2022 08:46:07
%S A241676 1,5,29,125,2045,8189,131069,524285,8388605,536870909,2147483645,
%T A241676 137438953469,2199023255549,8796093022205,140737488355325,
%U A241676 9007199254740989,576460752303423485,2305843009213693949,147573952589676412925,2361183241434822606845
%N A241676 2^p - 3 where p is prime.
%H A241676 Vincenzo Librandi, <a href="/A241676/b241676.txt">Table of n, a(n) for n = 1..200</a>
%t A241676 Table[2^Prime[n] - 3, {n, 20}]
%o A241676 (Magma) [2^p-3: p in PrimesUpTo(100)];
%Y A241676 Cf. similar sequence listed in A241573.
%K A241676 nonn
%O A241676 1,2
%A A241676 _Vincenzo Librandi_, Apr 29 2014