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A289490 Primes of the form k!4+8, where k!4 is the quadruple factorial number (A007662). 1
11, 13, 29, 53, 239, 593, 65843, 1514213, 5221133, 4996616633, 1729986783533, 7579867420133, 36453104912477522894633, 2442358029135994033939883, 173407420068655576409731133, 534602198949923693866675351078133, 7419136758370889359733910587728133 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Price, Table of n, a(n) for n = 1..22

Henri& Renaud Lifchitz, PRP Records.Search for n!4+8.

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, 4] + 8, {i, 0, 100}], PrimeQ[#]&]

CROSSREFS

Cf. A291343.

Sequence in context: A107645 A106014 A261371 * A056251 A222805 A089755

Adjacent sequences:  A289487 A289488 A289489 * A289491 A289492 A289493

KEYWORD

nonn

AUTHOR

Robert Price, Sep 02 2017

STATUS

approved

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Last modified August 3 08:10 EDT 2020. Contains 336197 sequences. (Running on oeis4.)