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A259045
Numbers n such that n!! - 2^6 is prime.
1
7, 9, 11, 17, 21, 27, 29, 39, 43, 45, 67, 145, 173, 613, 833, 1449, 1703, 1719, 2673, 19661, 36095, 37837, 37845
OFFSET
1,1
COMMENTS
a(24) > 50000.
LINKS
MATHEMATICA
Select[Range[0, 50000], #!! - 64 > 0 && PrimeQ[#!! - 64] &]
Select[Range[4, 6000], PrimeQ[#!! - 64] &] (* Vincenzo Librandi, Jun 18 2015 *)
CROSSREFS
Cf. A007749, A094144, A123910, A257864 (other forms of n!!-2^k)
Sequence in context: A107226 A252663 A317633 * A029611 A053357 A029634
KEYWORD
nonn,hard,more
AUTHOR
Robert Price, Jun 17 2015
STATUS
approved