

A136369


Numbers k such that A136368(k) is prime.


6




OFFSET

1,1


LINKS

Table of n, a(n) for n=1..8.


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.
Sequence in context: A271430 A326854 A097685 * A305511 A269472 A244272
Adjacent sequences: A136366 A136367 A136368 * A136370 A136371 A136372


KEYWORD

more,nonn


AUTHOR

Alexander Adamchuk, Dec 27 2007


EXTENSIONS

a(8) from Robert Price, Aug 28 2019


STATUS

approved



