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 A288883 #9 Apr 14 2025 07:39:14
%S A288883 2267,2467,3067,5827,60427,1108747,4190987,24346507,664565853954187,
%T A288883 3091650738178187,262134882788466690187,
%U A288883 571241722682644258978777268224002187,1189733928480144370053771930898033195089920002187,17994728558292550488813850298696914425610240002187
%N A288883 Primes of the form k!3 + 3^7, where k!3 is the triple factorial number (A007661).
%H A288883 Robert Price, <a href="/A288883/b288883.txt">Table of n, a(n) for n = 1..18</a>
%H A288883 Henri and Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n3+3^7&action=Search">PRP Records.Search for n!3+3^7</a>.
%H A288883 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 A288883 OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>.
%F A288883 a(n) = 2187 + A007661(A265200(n)). - _Elmo R. Oliveira_, Apr 14 2025
%t A288883 MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
%t A288883 Select[Table[MultiFactorial[i, 3] + 3^7, {i, 0, 100}], PrimeQ[#]&]
%Y A288883 Cf. A007661, A265200.
%K A288883 nonn
%O A288883 1,1
%A A288883 _Robert Price_, Jun 18 2017