login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A171582
Numbers k such that 10^k*(4+3*10^k)+3 is prime.
1
2, 6, 72, 246, 273, 292, 915, 14460
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,1
COMMENTS
No more terms up to k = 7200.
LINKS
Table of n, a(n) for n=1..8.
PROG
(PARI) is(n)=ispseudoprime(10^n*(4+3*10^n)+3) \\
Charles R Greathouse IV
, Jun 13 2017
CROSSREFS
Cf.
A171583
.
Sequence in context:
A195690
A359365
A329965
*
A152885
A295182
A052613
Adjacent sequences:
A171579
A171580
A171581
*
A171583
A171584
A171585
KEYWORD
more
,
nonn
AUTHOR
Jason Earls
, Dec 12 2009
EXTENSIONS
a(8) from
Michael S. Branicky
, Jun 24 2023
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 17 22:23 EDT 2024. Contains 371767 sequences. (Running on oeis4.)