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%I #4 Oct 31 2013 12:17:29
%S 17,28961,4598708691828421,1747509302894800001,
%T 8603990361433692835766763032506384134769654780784715495311087517908153547994512075361554378508046501
%N Primes in sequence a(n) = n*a(n-1) + 1, a(1) = 0 (A056542).
%H Tom Mueller, <a href="http://www.cs.uwaterloo.ca/journals/JIS/VOL8/Mueller/mueller6.pdf">Prime and Composite Terms in Sloane's Sequence A056542</a>, Journal of Integer Sequences, Vol. 8 (2005), Article 05.3.3.
%t Select[ FoldList[ #1*#2 + 1 &, 0, Range[2, 100]], PrimeQ[ # ] &] (* _Robert G. Wilson v_ *)
%Y Cf. A056542; indices of a(n) which are primes: A070213.
%K nonn
%O 1,1
%A _Paul Muljadi_, Oct 09 2005
%E a(5) from _Robert G. Wilson v_, Oct 11 2005
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