OFFSET
1,1
COMMENTS
n!8 = A114800(n).
No other terms < 50000. - Robert Price, Aug 15 2012
LINKS
Ken Davis, Status of Search for Multifactorial Primes.
Ken Davis, Results for n!8-1.
MATHEMATICA
MultiFactorial[n_, k_] := If[n < 1, 1, n*MultiFactorial[n - k, k]];
Select[Range[0, 1000], PrimeQ[MultiFactorial[#, 8] - 1] & ] (* Robert Price, Apr 19 2019 *)
PROG
(PARI) for(n=0, 9999, isprime(prod(i=0, (n-2)\8, n-8*i)-1)& print1(n", "))
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
M. F. Hasler, Jan 17 2012
EXTENSIONS
a(39)-a(64) from Robert Price, Aug 15 2012
STATUS
approved