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A136367 Numbers n such that A024529(n+1) is prime. 5
2, 3, 4, 5, 11, 59, 397, 613, 906 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A024529(n+1) = Numerator [ 1 + Sum[ (-1)^k*1/Prime[k], {k, 1, n} ] ] = {1,5,19,163,1583,22889,359083,7333087,158961311,...}.

LINKS

Table of n, a(n) for n=1..9.

MATHEMATICA

f=1; Do[ p=Prime[n]; f=f + (-1)^n*1/p; g=Numerator[f] ; If[ PrimeQ[g], Print[ {n, g} ] ], {n, 1, 60} ]

CROSSREFS

Cf. A024529 = Numerator of 1 + Sum_{k=1..n-1} (-1)^k / prime(k). Cf. A024530, A136366. Cf. A136365, A136368, A136369, A136370, A136371.

Sequence in context: A032988 A280206 A190783 * A014545 A158930 A065636

Adjacent sequences:  A136364 A136365 A136366 * A136368 A136369 A136370

KEYWORD

more,nonn

AUTHOR

Alexander Adamchuk, Dec 27 2007

EXTENSIONS

a(7) - a(9) from Alexander Adamchuk, Sep 15 2010

STATUS

approved

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Last modified January 18 23:05 EST 2019. Contains 319282 sequences. (Running on oeis4.)