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A289759 Primes of the form k!8-2, where k!8 is the octuple factorial number (A114800). 1
2, 3, 5, 7, 31, 103, 151, 3823, 16927, 126223, 137227543, 76663738303, 475493443423, 1132114642884223, 232032717002861773, 494437513909964623, 8949366251999798623, 22043108115271868623, 30822262564469609858623, 29990243754746489604765373 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Price, Table of n, a(n) for n = 1..32

Henri & Renaud Lifchitz, PRP Records.Search for n!8-2.

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, 8] - 2, {i, 3, 100}], PrimeQ[#]&]

CROSSREFS

Cf. A204664.

Sequence in context: A236255 A090711 A067907 * A175611 A278967 A217070

Adjacent sequences:  A289756 A289757 A289758 * A289760 A289761 A289762

KEYWORD

nonn

AUTHOR

Robert Price, Jul 11 2017

STATUS

approved

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Last modified October 21 11:42 EDT 2019. Contains 328296 sequences. (Running on oeis4.)