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A103890 Prime(n)! / prime(n)# + 1. 8
2, 2, 5, 25, 17281, 207361, 696729601, 12541132801, 115880067072001, 1366643159020339200001, 40999294770610176000001, 1854768736099424576471040000001, 109950690675973888893203251200000001 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = A039716(n)/A002110(n)+1 = A092435(n)+1.

LINKS

Table of n, a(n) for n=1..13.

R. Zumkeller, p(n)!/p(n )#+1

MATHEMATICA

#[[1]]/#[[2]]&/@With[{nn=15}, Thread[{Prime[Range[nn]]!, FoldList[ Times, Prime[ Range[nn]]]}]]+1 (* Harvey P. Dale, May 21 2019 *)

CROSSREFS

Cf. A103891, A103892, A103893, A103894, A103895, A103896, A103855.

Sequence in context: A173323 A019099 A154647 * A292699 A014566 A259861

Adjacent sequences:  A103887 A103888 A103889 * A103891 A103892 A103893

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Feb 20 2005

STATUS

approved

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Last modified December 12 09:36 EST 2019. Contains 329953 sequences. (Running on oeis4.)