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Search: id:A086125
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| A086125 |
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Values of n such that f(n) is a prime, where f(1) = 1, f(n) = prime(n)*f(n-1) + 2. |
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1
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OFFSET
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1,1
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MATHEMATICA
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f[1]=1; f[x_] := f[x] = Prime[x]*f[x - 1] + 2; Do[ If[ PrimeQ[ f[n]], Print[n]], {n, 1, 1900}]
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CROSSREFS
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The primes are in A086124.
Cf. A000668, A076481, A086122, A086123, A086124.
Adjacent sequences: A086122 A086123 A086124 this_sequence A086126 A086127 A086128
Sequence in context: A068030 A052325 A092603 this_sequence A061030 A036661 A108693
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KEYWORD
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more,nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Jul 23 2003
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EXTENSIONS
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Edited by Robert G. Wilson v (rgwv(AT)rgwv.com), Jul 25 2003
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