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A272593 Numbers n such that the multiplicative group modulo n is the direct product of 3 cyclic groups. 10
24, 40, 48, 56, 60, 72, 80, 84, 88, 96, 104, 105, 112, 132, 136, 140, 144, 152, 156, 160, 165, 176, 180, 184, 192, 195, 200, 204, 208, 210, 216, 220, 224, 228, 231, 232, 248, 252, 255, 260, 272, 273, 276, 285, 288, 296, 300, 304, 308, 315, 320, 328, 330, 340, 344, 345, 348, 352, 357, 364, 368, 372, 376, 380 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers n such that A046072(n) = 3.

LINKS

Table of n, a(n) for n=1..64.

PROG

(PARI) for(n=1, 10^3, my(t=#(znstar(n)[2])); if(t==3, print1(n, ", ")));

CROSSREFS

Direct product of k groups: A033948 (k=1), A272593 (k=2), A272594 (k=4), A272595 (k=5), A272596 (k=6), A272597 (k=7), A272598 (k=8), A272599 (k=9).

Sequence in context: A095158 A271422 A062374 * A048104 A334801 A297401

Adjacent sequences:  A272590 A272591 A272592 * A272594 A272595 A272596

KEYWORD

nonn

AUTHOR

Joerg Arndt, May 05 2016

STATUS

approved

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Last modified September 27 00:14 EDT 2020. Contains 337378 sequences. (Running on oeis4.)