login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A272597 Numbers n such that the multiplicative group modulo n is the direct product of 7 cyclic groups. 9
120120, 157080, 175560, 185640, 207480, 212520, 240240, 251160, 267960, 271320, 286440, 291720, 314160, 316680, 326040, 328440, 338520, 341880, 351120, 360360, 367080, 371280, 378840, 394680, 397320, 404040, 408408, 414120, 414960, 425040, 426360, 434280, 442680, 447720, 456456, 462840, 469560, 471240 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Numbers n such that A046072(n) = 7.

LINKS

Table of n, a(n) for n=1..38.

PROG

(PARI) for(n=1, 10^6, my(t=#(znstar(n)[2])); if(t==7, print1(n, ", ")));

CROSSREFS

Direct product of k groups: A033948 (k=1), A272593 (k=2), A272593 (k=3), A272594 (k=4), A272595 (k=5), A272596 (k=6), A272598 (k=8), A272599 (k=9).

Sequence in context: A234736 A236094 A043622 * A190378 A092015 A250673

Adjacent sequences:  A272594 A272595 A272596 * A272598 A272599 A272600

KEYWORD

nonn

AUTHOR

Joerg Arndt, May 05 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 28 02:44 EDT 2020. Contains 337392 sequences. (Running on oeis4.)