A289730 Primes of the form k!6-12, where k!6 is the sextuple factorial number (A085158).

43, 79, 21493, 623633, 21827563, 49579063, 104463111013, 32799650788086796039050613, 101604346379043295513350613, 3312764729596766399944113113, 40054638345554502541724271794363, 268110968591974440568718596462044971863, 10693051341516541524605341900168015859363

Offset

1,1

Links

Robert Price, Table of n, a(n) for n = 1..15

Henri & Renaud Lifchitz, PRP Records.Search for n!6-12.

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] - 12, {i, 8, 100}], PrimeQ[#]&]
Select[Table[Times@@Range[n, 1, -6]-12, {n, 8, 200}], PrimeQ] (* Harvey P. Dale, Jan 16 2024 *)

Crossrefs

Cf. A289688.

Sequence in context: A118075 A236839 A183074 * A045238 A139982 A171252

Adjacent sequences: A289727 A289728 A289729 * A289731 A289732 A289733

Keyword

nonn

Author

Robert Price, Jul 10 2017

Status

approved