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A112862 Primes of the form (2*k)!/(2*(k!)^2)-1. 3
2, 461, 92377, 269128937219, 51913710643776705684835559, 3017467217880703353213932318284163999 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The next term (2*306)!/(2*(306!)^2)-1 has 183 decimal digits.
LINKS
MATHEMATICA
Select[Table[(2n)!/(2(n!)^2)-1, {n, 70}], PrimeQ] (* James C. McMahon, Jun 13 2024 *)
CROSSREFS
Sequence in context: A363699 A099686 A066152 * A094484 A062620 A108973
KEYWORD
nonn
AUTHOR
Hugo Pfoertner, Sep 30 2005
STATUS
approved

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Last modified July 12 22:19 EDT 2024. Contains 374257 sequences. (Running on oeis4.)