login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A209193
Safe primes that are also highly cototient numbers.
0
23, 47, 59, 83, 167, 839, 2099, 5879, 6719, 23099, 27299, 180179, 414959, 420419, 628319, 660659, 840839, 1141139, 1681679, 2042039, 2277659, 4084079, 5525519, 5705699
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,1
LINKS
Table of n, a(n) for n=1..24.
PrimeFan,
Listing of Esoteric Integer Sequences
CROSSREFS
A005385
intersect
A100827
.
Sequence in context:
A052159
A097361
A073025
*
A201019
A244092
A042046
Adjacent sequences:
A209190
A209191
A209192
*
A209194
A209195
A209196
KEYWORD
nonn
,
more
AUTHOR
N. J. A. Sloane
, Mar 05 2012
EXTENSIONS
a(19)-a(24) calculated from the b-file at
A100827
by
Amiram Eldar
, Apr 09 2020
STATUS
approved
Lookup
|
Welcome
|
Wiki
|
Register
|
Music
|
Plot 2
|
Demos
|
Index
|
Browse
|
More
|
WebCam
Contribute new seq. or comment
|
Format
|
Style Sheet
|
Transforms
|
Superseeker
|
Recents
The OEIS Community
| Maintained by
The OEIS Foundation Inc.
License Agreements, Terms of Use, Privacy Policy.
.
Last modified April 23 08:33 EDT 2024. Contains 371905 sequences. (Running on oeis4.)