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 A259045 #9 Apr 03 2023 10:36:13 %S A259045 7,9,11,17,21,27,29,39,43,45,67,145,173,613,833,1449,1703,1719,2673, %T A259045 19661,36095,37837,37845 %N A259045 Numbers n such that n!! - 2^6 is prime. %C A259045 a(24) > 50000. %H A259045 C. K. Caldwell, The Prime Glossary, <a href="https://t5k.org/glossary/page.php/MultifactorialPrime.html">multifactorial prime</a> %H A259045 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> %t A259045 Select[Range[0, 50000], #!! - 64 > 0 && PrimeQ[#!! - 64] &] %t A259045 Select[Range[4, 6000], PrimeQ[#!! - 64] &] (* _Vincenzo Librandi_, Jun 18 2015 *) %Y A259045 Cf. A007749, A094144, A123910, A257864 (other forms of n!!-2^k) %Y A259045 Cf. A080778, A076185, A076186, A076188, A076189, A076190, A076193, A076194, A076195, A076196, A076197 (other forms of n!!+2^k) %K A259045 nonn,hard,more %O A259045 1,1 %A A259045 _Robert Price_, Jun 17 2015