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A067467 Primes p such that p-1 has 3 distinct prime factors. 1
31, 43, 61, 67, 71, 79, 103, 127, 131, 139, 151, 157, 181, 191, 199, 223, 229, 239, 241, 271, 277, 281, 283, 307, 311, 313, 337, 349, 367, 373, 379, 397, 409, 419, 431, 439, 443, 457, 461, 491, 499, 521, 523, 541, 599, 601, 607, 613, 617, 619, 643, 647, 659 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..53.

PROG

(PARI) lista(nn) = {forprime(p=1, nn, if (omega(p-1) == 3, print1(p, ", ")); ); } \\ Michel Marcus, Nov 22 2013

CROSSREFS

Cf. A006093, A008334.

Sequence in context: A225862 A089713 A281246 * A317851 A304239 A069455

Adjacent sequences:  A067464 A067465 A067466 * A067468 A067469 A067470

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Feb 23 2002

STATUS

approved

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Last modified April 10 08:09 EDT 2021. Contains 342845 sequences. (Running on oeis4.)