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A259359
Numbers n such that n!!-8 is prime.
1
5, 7, 9, 19, 41, 43, 83, 89, 91, 143, 299, 307, 341, 381, 585, 995, 1019, 1027, 2043, 4301, 6275, 11157, 11621, 12315, 17505, 24771, 30535, 38635
OFFSET
1,1
COMMENTS
Corresponding primes are 7, 97, 937, 654729067, 13113070457687988603440617, ... .
a(29) > 50000.
MATHEMATICA
Select[Range[5, 1000], PrimeQ[#!!-8]&]
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
Robert Price, Jun 24 2015
STATUS
approved