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 A288405 #5 Jun 08 2017 23:49:14
%S A288405 5,7,19,109,10399,34459429,6190283353629379,319830986772877770815629,
%T A288405 563862029680583509947946879,
%U A288405 174865344543353986303948473285124243127671456831640629,2987435000850314871976096554696085799164511452611632783323554397412109379
%N A288405 Primes of the form k!2+4, where k!2 is the double factorial number (A006852).
%H A288405 Robert Price, <a href="/A288405/b288405.txt">Table of n, a(n) for n = 1..11</a>
%H A288405 Henri& Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n2+4&action=Search">PRP Records.Search for n!2+4.</a>
%H A288405 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 A288405 OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>
%t A288405 MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
%t A288405 Select[Table[MultiFactorial[i, 2] + 4, {i, 0, 100}], PrimeQ[#]&]
%Y A288405 Cf. A076186.
%K A288405 nonn
%O A288405 1,1
%A A288405 _Robert Price_, Jun 08 2017