login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A197309 Divisors of the 9th repunit 111111111. 2
1, 3, 9, 37, 111, 333, 333667, 1001001, 3003003, 12345679, 37037037, 111111111 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The prime factorization of (10^9 - 1)/9 is 3^2 * 37 * 333667. - Alonso del Arte, Apr 27 2014

LINKS

Table of n, a(n) for n=1..12.

Index entries for sequences related to divisors of numbers.

MATHEMATICA

Divisors[(10^9 - 1)/9] (* Alonso del Arte, Apr 27 2014 *)

PROG

(PARI) divisors(10^9\9) \\ Charles R Greathouse IV, Jun 21 2017

CROSSREFS

Cf. A109492, A197308, A070529, A018282, A018766, A027894, A027893, A027892, A027891, A027890, A027889, A027895.

Sequence in context: A076964 A034808 A018398 * A149021 A149022 A134818

Adjacent sequences:  A197306 A197307 A197308 * A197310 A197311 A197312

KEYWORD

nonn,fini,full,easy

AUTHOR

M. F. Hasler, Oct 13 2011

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 July 17 16:38 EDT 2019. Contains 325107 sequences. (Running on oeis4.)