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A136369 Numbers n such that A136368(n) is prime. +0
7
2, 5, 6, 8, 18, 20, 98 (list; graph; listen)
OFFSET

1,1

MATHEMATICA

f=0; Do[ p=Prime[n]; f=f + (-1)^(n+1)*1/p^2; g=Numerator[f] ; If[ PrimeQ[g], Print[ {n, g} ] ], {n, 1, 100} ]

CROSSREFS

Cf. A024530 = Numerator of Sum_{k=1..n} (-1)^k / prime(k). Cf. A136368 = Numerator of Sum[ (-1)^(k+1)*1/Prime[k]^2, {k, 1, n} ] ]. Cf. A136365, A136366, A136367, A136370, A136371.

Adjacent sequences: A136366 A136367 A136368 this_sequence A136370 A136371 A136372

Sequence in context: A127143 A079256 A097685 this_sequence A007573 A143909 A139454

KEYWORD

more,nonn

AUTHOR

Alexander Adamchuk (alex(AT)kolmogorov.com), Dec 27 2007

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Last modified November 9 12:23 EST 2009. Contains 166233 sequences.


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