A110915 Primes in sequence a(n) = n*a(n-1) + 1, a(1) = 0 (A056542).

17, 28961, 4598708691828421, 1747509302894800001, 8603990361433692835766763032506384134769654780784715495311087517908153547994512075361554378508046501

Offset

1,1

Links

Table of n, a(n) for n=1..5.

Tom Mueller, Prime and Composite Terms in Sloane's Sequence A056542, Journal of Integer Sequences, Vol. 8 (2005), Article 05.3.3.

Mathematica

Select[ FoldList[ #1*#2 + 1 &, 0, Range[2, 100]], PrimeQ[ # ] &] (* Robert G. Wilson v *)

Crossrefs

Cf. A056542; indices of a(n) which are primes: A070213.

Sequence in context: A134360 A171687 A178050 * A068733 A066161 A125040

Adjacent sequences: A110912 A110913 A110914 * A110916 A110917 A110918

Keyword

nonn

Author

Paul Muljadi, Oct 09 2005

Extensions

a(5) from Robert G. Wilson v, Oct 11 2005

Status

approved