OFFSET
1,1
COMMENTS
a(45) > 10^5.
The first 9 primes associated with this sequence: 2, 3, 19, 43, 229, 3463, 208843, 5221123, 151412623.
LINKS
C. Caldwell and H. Dubner (Eds): The top ten prime numbers: from the unpublished collections of R. Ondrejka (May 2001), Table 21 F, p. 75
Ken Davis, Status of Search for Multifactorial Primes.
MATHEMATICA
MultiFactorial[n_, k_] := If[n < 1, 1, n*MultiFactorial[n - k, k]];
Select[Range[2, 50000], PrimeQ[MultiFactorial[#, 4] - 2] &]
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert Price, Mar 10 2017
EXTENSIONS
a(43)-a(44) from Robert Price, Jul 24 2017
STATUS
approved