login
The OEIS is supported by the many generous donors to the OEIS Foundation.
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A018490
Divisors of 504.
1
1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 24, 28, 36, 42, 56, 63, 72, 84, 126, 168, 252, 504
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Numbers k such that all Dirichlet characters modulo k take values of Eisenstein integers. - Eric Chen and Jianing Song, Jul 14 2026
LINKS
Table of n, a(n) for n=1..24.
Wikipedia, Dirichlet character.
Index entries for sequences related to divisors of numbers
MATHEMATICA
Divisors[504] (* Harvey P. Dale, Mar 02 2020 *)
PROG
(PARI) divisors(504) \\ Charles R Greathouse IV, Jun 21 2017
CROSSREFS
Sequence in context: A267301 A233576 A128170 * A351038 A113498 A036796
Adjacent sequences: A018487 A018488 A018489 * A018491 A018492 A018493
KEYWORD
nonn,fini,full,easy
AUTHOR
N. J. A. Sloane
STATUS
approved

Lookup Welcome Wiki Register Music Plot 2 Demos Index WebCam Contribute Format Style Sheet Transforms Superseeker Recents
The OEIS Community
Maintained by The OEIS Foundation Inc.
Last modified September 5 11:42 EDT 2026. Contains 398988 sequences.
License Agreements, Terms of Use, Privacy Policy