login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A171686
Numbers k such that (10^k)^4 + (10^k+1)^4 is prime.
0
0, 3, 10, 22, 59, 84, 5604
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,2
COMMENTS
No more terms up to k = 4200.
LINKS
Table of n, a(n) for n=1..7.
Prime Curio,
200..400..600..400..1
PROG
(PARI) is(n)=ispseudoprime((10^n)^4+(10^n+1)^4) \\
Charles R Greathouse IV
, Jun 13 2017
CROSSREFS
Sequence in context:
A222629
A070880
A321335
*
A027164
A292921
A270470
Adjacent sequences:
A171683
A171684
A171685
*
A171687
A171688
A171689
KEYWORD
more
,
nonn
AUTHOR
Jason Earls
, Dec 15 2009
EXTENSIONS
a(7) from
Michael S. Branicky
, Mar 21 2024
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 28 04:50 EDT 2024. Contains 372020 sequences. (Running on oeis4.)