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 A248626 #12 Jan 07 2018 23:44:11
%S A248626 3,22,18,50,48,5,48,121,390,21,37,9,11,110,672,11628,14,286,1000,329,
%T A248626 15,29,32,7,90,42,1001,816,24,408,806,6219,761,44,75,88,30,711,16,43,
%U A248626 2202,110,6112,624,12206,590,21,156,551,525,194,64,201,225,261,1132,305,66,500,50
%N A248626 Least positive integer m such that prime(m+n) divides 2^m - 1.
%C A248626 Conjecture: a(n) exists for any n > 0.
%H A248626 Chai Wah Wu, <a href="/A248626/b248626.txt">Table of n, a(n) for n = 1..9844</a> (n = 1..587 from Zhi-Wei Sun)
%e A248626 a(2) = 22 since prime(22+2) = 89 divides 2^(22)-1 = 4194303 = 89*47127.
%t A248626 Do[m=1;Label[aa];If[Mod[2^m-1,Prime[m+n]]==0,Print[n," ",m];Goto[bb]];m=m+1;Goto[aa];Label[bb];Continue,{n,1,60}]
%Y A248626 Cf. A000040, A000225, A248588.
%K A248626 nonn
%O A248626 1,1
%A A248626 _Zhi-Wei Sun_, Oct 10 2014