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 A289854 #8 Apr 14 2025 17:32:34
%S A289854 41,881,10331,34459361,13749310511,213458046676811,6190283353629311,
%T A289854 319830986772877770815561,563862029680583509947946811,
%U A289854 25373791335626257947657609311,488960130368663401543922783473071784646213671811
%N A289854 Primes of the form k!2 - 64, where k!2 is the double factorial number (A006882).
%H A289854 Robert Price, <a href="/A289854/b289854.txt">Table of n, a(n) for n = 1..13</a>
%H A289854 Henri and Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n2-64&action=Search">PRP Records.Search for n!2-64</a>.
%H A289854 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 A289854 OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>.
%F A289854 a(n) = A006882(A259045(n)) - 64. - _Elmo R. Oliveira_, Apr 14 2025
%t A289854 MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
%t A289854 Select[Table[MultiFactorial[i, 2] - 64, {i, 7, 100}], PrimeQ[#]&]
%Y A289854 Cf. A006882, A259045.
%K A289854 nonn
%O A289854 1,1
%A A289854 _Robert Price_, Jul 13 2017