A289734 Primes of the form k!6-27, where k!6 is the sextuple factorial number (A085158).

13, 197, 613, 13404133, 24663654373, 37455569511954513919973, 448140631309739369262009548799973, 38794993239276710062728555790335999973

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..11

Henri & Renaud Lifchitz, PRP Records.Search for n!6-27.

Joe McLean, Interesting Sources of Probable Primes

OpenPFGW Project, Primality Tester

Mathematica

MultiFactorial[n_, k_] := If[n<1, 1, n*MultiFactorial[n-k, k]];
Select[Table[MultiFactorial[i, 6] - 27, {i, 9, 100}], PrimeQ[#]&]
Select[Table[Times@@Range[n, 1, -6]-27, {n, 10, 200}], PrimeQ] (* Harvey P. Dale, Aug 22 2020 *)

Crossrefs

Cf. A289698.

Sequence in context: A099271 A081796 A140536 * A130549 A361171 A157690

Adjacent sequences: A289731 A289732 A289733 * A289735 A289736 A289737

Keyword

nonn

Author

Robert Price, Jul 10 2017

Status

approved