A112862 Primes of the form (2*k)!/(2*(k!)^2)-1.

2, 461, 92377, 269128937219, 51913710643776705684835559, 3017467217880703353213932318284163999

Offset: 1

Author

Hugo Pfoertner, Sep 30 2005

Keywords

• nonn

Comments

The next term (2*306)!/(2*(306!)^2)-1 has 183 decimal digits.

Crossrefs

Cf. A001700, A112861, A112864.

Programs

Mathematica

Select[Table[(2n)!/(2(n!)^2)-1, {n, 70}],PrimeQ] (* James C. McMahon, Jun 13 2024 *)