login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A289550 Primes of the form k!6-4, where k!6 is the sextuple factorial number (A085158). 1

%I

%S 2,3,23,401,8501,229631,623641

%N Primes of the form k!6-4, where k!6 is the sextuple factorial number (A085158).

%C The next term is too large to display.

%H Robert Price, <a href="/A289550/b289550.txt">Table of n, a(n) for n = 1..10</a>

%H Henri & Renaud Lifchitz, <a href="http://www.primenumbers.net/prptop/searchform.php?form=n6-4&amp;action=Search">PRP Records.Search for n!6-4.</a>

%H 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 OpenPFGW Project, <a href="http://sourceforge.net/projects/openpfgw/">Primality Tester</a>

%t MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];

%t Select[Table[MultiFactorial[i, 6] - 4, {i, 4, 100}], PrimeQ[#]&]

%Y Cf. A289547.

%K nonn

%O 1,1

%A _Robert Price_, Jul 07 2017

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 17 12:32 EST 2020. Contains 331996 sequences. (Running on oeis4.)