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 A020237 #24 Nov 17 2019 09:33:26
%S A020237 133,793,2047,4577,5041,12403,13333,14521,17711,23377,43213,43739,
%T A020237 47611,48283,49601,50737,50997,56057,58969,68137,74089,85879,86347,
%U A020237 87913,88831,102173,111055,114211,115231,137149,139231,171601,172369,193249,196555
%N A020237 Strong pseudoprimes to base 11.
%H A020237 Amiram Eldar, <a href="/A020237/b020237.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..636 from R. J. Mathar)
%H A020237 <a href="/index/Ps#pseudoprimes">Index entries for sequences related to pseudoprimes</a>
%o A020237 (PARI) /* insert A001262 code here */
%o A020237 isA020237(n)={
%o A020237 isStrongPsp(n,11)
%o A020237 }
%o A020237 {
%o A020237 for(n=1,10000000000,
%o A020237 if(isA020237(n), print(n) ;) ;
%o A020237 ) ;
%o A020237 } /* _R. J. Mathar_, Mar 07 2012 */
%Y A020237 Cf. A020139, A001262, A020229, A020230, A020231, A020232, A020233, A020234, A020235, A020236.
%K A020237 nonn
%O A020237 1,1
%A A020237 _David W. Wilson_