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 A230483 #14 Apr 01 2024 02:38:26 %S A230483 4681,29341,42799,49141,52633,85489,90751,104653,458989,1004653, %T A230483 1082401,1251949,1302451,1907851,2510569,2811271,3090091,3539101, %U A230483 5044033,5049001,5489641,5590621,7177105,9069229,9073513,9567673,9995671,10323769,11473885,12263131 %N A230483 Strong pseudoprimes (base 2) that become prime when two is subtracted. %H A230483 Amiram Eldar, <a href="/A230483/b230483.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..5001 from Shyam Sunder Gupta) %e A230483 4681 is a strong pseudoprime (base 2) and 4679 is prime. %Y A230483 Cf. A001567, A001262, A230484, A230485, A230487. %K A230483 nonn %O A230483 1,1 %A A230483 _Shyam Sunder Gupta_, Oct 20 2013