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A247164
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Primes p such that Product_{d|(p-2)} phi(d) = Product_{d|(p-1)} phi(d) where phi(x) = Euler totient function (A000010).
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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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First 5 known terms of Fermat primes (A019434) are terms of this sequence.
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LINKS
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FORMULA
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EXAMPLE
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PROG
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(Magma) [n: n in [3..100000] | IsPrime(n) and (&*[EulerPhi(d): d in Divisors(n-2)]) eq (&*[EulerPhi(d): d in Divisors(n-1)])]
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CROSSREFS
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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