1,1

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

Cf. A001700(n-1)=(2*n)!/(2*(n!)^2), A112861 gives n such that (2*n)!/(2*(n!)^2)-1 is prime, A112864 gives primes of the form (2*n)!/(2*(n!)^2)+1.

Sequence in context: A012734 A099686 A066152 this_sequence A094484 A062620 A108973

Adjacent sequences: A112859 A112860 A112861 this_sequence A112863 A112864 A112865

nonn

Hugo Pfoertner (hugo(AT)pfoertner.org), Sep 30 2005