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A094144
Numbers n such that n!! - 2 is prime.
17
5, 7, 15, 17, 19, 51, 73, 89, 131, 153, 245, 333, 441, 463, 825, 1771, 2027, 9157, 10875, 20515
OFFSET
1,1
COMMENTS
a(21) > 50000. - Robert Price, Apr 14 2015
MATHEMATICA
Select[Range[0, 50000], PrimeQ[#!! - 2] &] (* Robert Price, Apr 14 2014 *)
CROSSREFS
Cf. A076185.
Sequence in context: A314357 A314358 A081965 * A314359 A314360 A314361
KEYWORD
nonn
AUTHOR
Lekraj Beedassy, May 04 2004
EXTENSIONS
Corrected by Robert G. Wilson v, May 05 2004
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 03 2008
STATUS
approved