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 A076195 #30 Sep 16 2018 04:37:48
%S A076195 0,1,5,9,11,13,23,135,187,215,233,313,333,493,1459,2753,2813,6411,
%T A076195 31191,38303,41487
%N A076195 Numbers k such that k!! + 2^8 is prime.
%C A076195 a(22) > 50000. - _Robert Price_, Jan 14 2015
%C A076195 a(1)=0 since 0!!=1 and 1 + 2^8 = 257 is prime. - _Robert Price_, Jan 14 2015
%H A076195 The OpenPFGW Project, <a href="http://www.primeform.net/openpfgw/">Primality Tester</a>
%H A076195 Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n%212%2B2%5E8&action=Search">PRP Records.</a>
%t A076195 lst={}; Do[If[PrimeQ[n!!+2^8], AppendTo[lst, n]], {n, 0, 50000}]; lst
%Y A076195 Cf. A006882, A080778 and A076185, A076186, A076188, A076189, A076190, A076193, A076194, A076196, A076197 for other values of s in n!! + 2^s.
%K A076195 nonn,more
%O A076195 1,3
%A A076195 _Zak Seidov_, Nov 02 2002
%E A076195 Edited and extended (n < 4096) by _Hugo Pfoertner_, Jun 19 2003
%E A076195 a(18) from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008
%E A076195 a(1)=0 prepended and a(19)-a(21) from _Robert Price_, Jan 14 2015