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A112854 Primes of the form (2*n)!/n!-1. 2
11, 665279, 3497296636753919999, 1960781468160819415703172080467967999999 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Next term (2*114)!/114!-1 has 254 decimal digits.

LINKS

Table of n, a(n) for n=1..4.

CROSSREFS

A112853 gives n such that (2*n)!/n!-1 is prime, A112856 gives primes of the form (2*n)!/n!+1.

Sequence in context: A219013 A243130 A253632 * A211238 A014127 A049192

Adjacent sequences:  A112851 A112852 A112853 * A112855 A112856 A112857

KEYWORD

nonn

AUTHOR

Hugo Pfoertner, Sep 25 2005

STATUS

approved

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Last modified July 23 20:32 EDT 2019. Contains 325264 sequences. (Running on oeis4.)