A289549 Primes of the form k!6-3, where k!6 is the sextuple factorial number (A085158).

2, 3, 13, 37, 73569236156415997, 2076797833465298943997, 3445912395099815280639997, 337699414719781897502719997, 2406637297721880276844203212799997, 56505983376657530671203898929399315771217221372411818526783048069123288081453694320639999999999997

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..10

Henri & Renaud Lifchitz, PRP Records.Search for n!6-3.

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] - 3, {i, 3, 100}], PrimeQ[#]&]

Crossrefs

Cf. A279646.

Sequence in context: A168483 A100424 A347537 * A259261 A141511 A235615

Adjacent sequences: A289546 A289547 A289548 * A289550 A289551 A289552

Keyword

nonn

Author

Robert Price, Jul 07 2017

Status

approved