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A073309
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Primes of the form n! + n + 1.
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2
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OFFSET
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1,1
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COMMENTS
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a(5) = 3628811 and a(6), a 68-digit number, have been certified prime with Primo.
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LINKS
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FORMULA
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EXAMPLE
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a(4) = 6! + 6 + 1 = 727, a prime, so 727 is in this sequence (6 = A073308(4)).
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MATHEMATICA
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PROG
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(PARI) for(n=0, 1960, p=n!+n+1; if(isprime(p), print1(p, ", ")))
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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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