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 A100105 #19 Sep 08 2022 08:45:15 %S A100105 2,5,27,121,2037,8179,131055,524269,8388585,536870883,2147483617, %T A100105 137438953435,2199023255511,8796093022165,140737488355281, %U A100105 9007199254740939,576460752303423429,2305843009213693891 %N A100105 a(n) = 2^prime(n)-prime(n). %H A100105 N. J. A. Sloane, <a href="/A100105/b100105.txt">Table of n, a(n) for n = 1..100</a> %p A100105 seq( (2^ithprime(x)-ithprime(x)),x=1..20); %t A100105 f[n_]:=(2^Prime[n]-Prime[n]); Array[f,4!,1] (* _Vladimir Joseph Stephan Orlovsky_, Oct 17 2009 *) %o A100105 (Magma) [2^p - p: p in PrimesUpTo(80)]; // _Vincenzo Librandi_, Jun 03 2014 %Y A100105 Cf. A001348, A034785. %K A100105 nonn %O A100105 1,1 %A A100105 _Jorge Coveiro_, Dec 26 2004