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A162455
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Primes of the form (n!)^2 + (n!) + 1.
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0
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OFFSET
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1,1
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COMMENTS
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a(6) =
355509027001074785420251313577077264819432566692554164797700525028005\
008417722668844213916658906516439209129303887999464691915088148300993\
913093163021697465163231343499013584682565554967153792311772997222400\
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LINKS
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FORMULA
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MAPLE
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a := proc (n) if isprime(factorial(n)^2+factorial(n)+1) = true then factorial(n)^2+factorial(n)+1 else end if end proc: seq(a(n), n = 1 .. 76); # Emeric Deutsch, Jul 21 2009
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MATHEMATICA
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Select[Table[n!^2+n!+1, {n, 150}], PrimeQ] (* Harvey P. Dale, Jul 23 2009 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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