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A114257 Numbers n such that A014285(n) is prime. 1
1, 3, 32, 63, 67, 75, 88, 99, 104, 115, 116, 120, 135, 144, 159, 167, 179, 188, 192, 195, 199, 204, 227, 239, 244, 260, 280, 283, 304, 323, 335, 348, 351, 379, 380, 384, 396, 412, 424, 436, 443, 503, 508, 523, 579, 632, 648, 651, 695, 723, 724, 736, 743, 752 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..54.

PROG

(PARI) isok(n) = isprime(sum(i=1, n, i*prime(i))); \\ Michel Marcus, May 25 2018

CROSSREFS

Cf. A014285 (Sum i*prime(i); i=1..n), A114256 (Prime numbers in A014285).

Sequence in context: A304048 A324223 A197368 * A197524 A107465 A319219

Adjacent sequences:  A114254 A114255 A114256 * A114258 A114259 A114260

KEYWORD

nonn

AUTHOR

Zak Seidov, Nov 18 2005

STATUS

approved

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Last modified September 28 10:48 EDT 2021. Contains 347714 sequences. (Running on oeis4.)