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Numbers n such that n!^2-+8663 are primes.
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%I #7 Mar 26 2019 19:20:34

%S 3,4,5,6,40

%N Numbers n such that n!^2-+8663 are primes.

%C Next term is larger than 72

%C a(6) > 1000 (if it exists) - _Robert Price_, Mar 26 2019

%t lst={};a=8663;Do[If[PrimeQ[n!^2-a]&&PrimeQ[n!^2+a],AppendTo[lst,n]],{n,3*4!}];lst

%Y Cf. A144046, A154660, A154661, A154662, A154663, A154664

%K nonn,more

%O 1,1

%A _Vladimir Joseph Stephan Orlovsky_, Jan 13 2009