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A289851 Primes of the form k!2-8, where k!2 is the double factorial number (A006852). 1
7, 97, 937, 654729067, 13113070457687988603440617, 563862029680583509947946867, 536347102817482913555411512425352545980058003572241486357421867, 352999527454840466971061863960307904899505075341088595453568994140617 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

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

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, 2] - 8, {i, 5, 100}], PrimeQ[#]&]

CROSSREFS

Cf. A259359.

Sequence in context: A116288 A219088 A116261 * A242377 A178005 A268706

Adjacent sequences:  A289848 A289849 A289850 * A289852 A289853 A289854

KEYWORD

nonn

AUTHOR

Robert Price, Jul 13 2017

STATUS

approved

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Last modified April 18 19:31 EDT 2021. Contains 343089 sequences. (Running on oeis4.)