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A289854 Primes of the form k!2-64, where k!2 is the double factorial number (A006852). 1
41, 881, 10331, 34459361, 13749310511, 213458046676811, 6190283353629311, 319830986772877770815561, 563862029680583509947946811, 25373791335626257947657609311, 488960130368663401543922783473071784646213671811 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Robert Price, Table of n, a(n) for n = 1..13

Henri & Renaud Lifchitz, PRP Records.Search for n!2-64.

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, 2] - 64, {i, 7, 100}], PrimeQ[#]&]

CROSSREFS

Cf. A259045.

Sequence in context: A010993 A208431 A275355 * A228257 A182359 A090836

Adjacent sequences:  A289851 A289852 A289853 * A289855 A289856 A289857

KEYWORD

nonn

AUTHOR

Robert Price, Jul 13 2017

STATUS

approved

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Last modified April 20 09:59 EDT 2019. Contains 322309 sequences. (Running on oeis4.)