A289733 Primes of the form k!6-24, where k!6 is the sextuple factorial number (A085158).

3, 31, 67, 911, 21481, 43201, 623621, 1339951, 49579051, 2131900201, 2229272062301, 8549258359016351, 606997343490162601, 46738795448742522101, 135419196954588922351, 131181879631714694053764558690601, 4766501963120985802465188343530601

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..19

Henri & Renaud Lifchitz, PRP Records.Search for n!6-24.

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] - 24, {i, 9, 100}], PrimeQ[#]&]

Crossrefs

Cf. A289697.

Sequence in context: A041207 A133203 A062616 * A244916 A031916 A137185

Adjacent sequences: A289730 A289731 A289732 * A289734 A289735 A289736

Keyword

nonn

Author

Robert Price, Jul 10 2017

Status

approved