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A154665 Numbers n such that n!^2-+8663 are primes. 0
3, 4, 5, 6, 40 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Next term is larger than 72

a(6) > 1000 (if it exists) - Robert Price, Mar 26 2019

LINKS

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

MATHEMATICA

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

CROSSREFS

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

Sequence in context: A083401 A281829 A083400 * A056190 A202702 A049465

Adjacent sequences:  A154662 A154663 A154664 * A154666 A154667 A154668

KEYWORD

nonn,more

AUTHOR

Vladimir Joseph Stephan Orlovsky, Jan 13 2009

STATUS

approved

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Last modified September 29 01:05 EDT 2022. Contains 357082 sequences. (Running on oeis4.)