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 A076186 #40 Nov 08 2017 07:44:12 %S A076186 0,1,3,5,7,11,17,29,39,43,73,93,315,549,2059,5543,6937,22819,34523 %N A076186 Numbers n such that n!! + 2^2 is prime. %C A076186 a(20) > 50000. - _Robert Price_, Feb 05 2015 %C A076186 Since 0!! is defined to be unity (A006882), 0!! + 2^2 = 5, which is prime. - _Robert Price_, Mar 22 2015 %H A076186 Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n!2%2B4&action=Search">PRP Records. Search for n!2+4.</a> %H A076186 Joe McLean, <a href="http://web.archive.org/web/20091027034731/http://uk.geocities.com/nassarawa%40btinternet.com/probprim2.htm">Interesting Sources of Probable Primes</a> %H A076186 The OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a> %t A076186 Select[Range[0, 1000], PrimeQ[#!! + 4] &] (* _Robert Price_, Mar 22 2015 *) %Y A076186 Cf. A006882, A080778 and A076185, A076188, A076189, A076190, A076193, A076194, A076195, A076196, A076197 for other values of s in n!! + 2^s. %K A076186 nonn,more %O A076186 1,3 %A A076186 _Zak Seidov_, Nov 02 2002 %E A076186 Edited and extended (n<4096) by _Hugo Pfoertner_, Jun 19 2003 %E A076186 6937 from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008 %E A076186 Corrected by Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008 %E A076186 a(18) = 22819 from _Robert Price_, Oct 04 2012 %E A076186 a(19) = 34523 from _Robert Price_, Feb 05 2015 %E A076186 a(1)=0 prepended by _Robert Price_, Mar 22 2015