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A112856 Primes of the form (2*n)!/n!+1. 2
3, 13, 30241, 670442572801, 20007974164906320568399715106816000001, 31370018474571622355156067715319586116075520000001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Next term (2*72)!/72!+1 has 146 decimal digits.

LINKS

Table of n, a(n) for n=1..6.

CROSSREFS

Cf. A112855 n such that (2*n)!/n!+1 is prime, A112854 primes of the form (2*n)!/n!-1.

Sequence in context: A087333 A320041 A016104 * A007523 A092830 A317481

Adjacent sequences:  A112853 A112854 A112855 * A112857 A112858 A112859

KEYWORD

nonn

AUTHOR

Hugo Pfoertner, Sep 25 2005

STATUS

approved

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Last modified October 17 04:02 EDT 2019. Contains 328106 sequences. (Running on oeis4.)