login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A057462
Numbers n such that 10*11^n + 1 is prime.
2
0, 10, 24, 864, 2440, 9438, 68272, 148602
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,2
COMMENTS
a(9) > 2*10^5. -
Robert Price
, Jan 19 2015
LINKS
Table of n, a(n) for n=1..8.
MATHEMATICA
Do[ If[ PrimeQ[ 10*11^n + 1 ], Print[ n ] ], {n, 0, 1000} ]
Select[Range[0, 4000], PrimeQ[(10*11^# + 1)] &] (*
Vincenzo Librandi
, Sep 28 2012 *)
PROG
(PARI) is(n)=ispseudoprime(10*11^n+1) \\
Charles R Greathouse IV
, Jun 13 2017
CROSSREFS
Sequence in context:
A103071
A264296
A265150
*
A180043
A225974
A251317
Adjacent sequences:
A057459
A057460
A057461
*
A057463
A057464
A057465
KEYWORD
nonn
AUTHOR
Robert G. Wilson v
, Sep 08 2000
EXTENSIONS
a(5) from
Vincenzo Librandi
, Sep 28 2012
a(6)-a(8) from
Robert Price
, Jan 19 2015
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 July 12 04:44 EDT 2024. Contains 374237 sequences. (Running on oeis4.)