OFFSET
1,1
COMMENTS
Corresponding primes are: 23, 59, 373, 1697, 7577923, 21827543, 295540213, ...
a(35) > 10^5.
Terms > 39 correspond to probable primes.
LINKS
Henri & Renaud Lifchitz, PRP Records. Search for n!6-32.
Joe McLean, Interesting Sources of Probable Primes
OpenPFGW Project, Primality Tester
EXAMPLE
15!6 - 32 = 15*9*3 - 32 = 373 is prime, so 15 is in the sequence.
MATHEMATICA
MultiFactorial[n_, k_] := If[n < 1, 1, n*MultiFactorial[n - k, k]];
Select[Range[10, 50000], PrimeQ[MultiFactorial[#, 6] - 32] &]
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Robert Price, Jul 09 2017
EXTENSIONS
a(32)-a(34) from Robert Price, Aug 04 2018
STATUS
approved