A114257 Numbers n such that A014285(n) is prime.

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

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