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A290117
Primes of the form k! / 4 - 1.
1
5, 29, 179, 1259, 10079, 907199, 326918591999, 1600593426431999, 6463004184721244159999
OFFSET
1,1
FORMULA
a(n) = (A139199(n)!-4)/4.
MATHEMATICA
Select[Table[i! / 4 - 1, {i, 4, 100}], PrimeQ[#]&]
CROSSREFS
Sequence in context: A163073 A190802 A139174 * A153296 A194723 A190917
KEYWORD
nonn
AUTHOR
Robert Price, Jul 19 2017
STATUS
approved