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 A241573 #12 Sep 08 2022 08:46:07
%S A241573 7,11,35,131,2051,8195,131075,524291,8388611,536870915,2147483651,
%T A241573 137438953475,2199023255555,8796093022211,140737488355331,
%U A241573 9007199254740995,576460752303423491,2305843009213693955,147573952589676412931,2361183241434822606851
%N A241573 2^p + 3 where p is prime.
%H A241573 Vincenzo Librandi, <a href="/A241573/b241573.txt">Table of n, a(n) for n = 1..200</a>
%t A241573 Table[2^Prime[n] + 3, {n, 20}]
%o A241573 (Magma) [2^p+3: p in PrimesUpTo(100)];
%o A241573 (Sage) [2^p+3 for p in primes(100)] # _Bruno Berselli_, Apr 29 2014
%Y A241573 Cf. sequences of the form 2^p+k with p prime: A034785 (k=0), A001348 (k=-1), A098640 (k=1), A241676 (k=-3), this sequence (k=3), A241678 (k=-5), A241677 (k=5), A098815 (k=-7), A241679 (k=7), A098231 (k=-11), A241680 (k=11).
%K A241573 nonn
%O A241573 1,1
%A A241573 _Vincenzo Librandi_, Apr 29 2014