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 A247466 #13 Feb 16 2025 08:33:23
%S A247466 11,26,37,38,40,41,62,131,211,212,251,272,284,383,427,538,590,860,
%T A247466 1087,1280,1826,1835,1895,2276,2524,2872,3769,3878,4334,5704,14332,
%U A247466 23386,42694
%N A247466 Numbers n such that n!3 - 3^6 is prime.
%C A247466 Large terms correspond to probable primes.
%C A247466 a(34) > 50000.
%H A247466 Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n!3-729&action=Search">PRP Records. Search for n!3-729</a>
%H A247466 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 A247466 OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>
%H A247466 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Multifactorial.html">Multifactorial</a>
%e A247466 11!3-729 = 11*8*5*2-729= 151 is prime, so 11 is in the sequence.
%t A247466 MultiFactorial[n_, k_] := If[n < 1, 1, If[n < k + 1, n, n*MultiFactorial[n - k, k]]];
%t A247466 lst={};Do[If[PrimeQ[MultiFactorial[n, 3] - 729], AppendTo[lst, n]], {n, 100}];lst
%Y A247466 Cf. A007661, A037082, A084438, A243078.
%K A247466 nonn,more
%O A247466 1,1
%A A247466 _Robert Price_, Sep 17 2014