login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A210311
Primes that can be represented exactly in one way as a^2 + b^2 + c^2, 0 < a <= b <= c.
1
3, 11, 17, 19, 29, 43, 53, 61, 67, 73, 97, 109, 157, 163, 193, 277, 397
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,1
COMMENTS
Note that there are no primes = 7 mod 8.
This sequence is probably complete. Is there a proof?
There are no more terms < 10^7. -
Donovan Johnson
, Mar 22 2012
LINKS
Table of n, a(n) for n=1..17.
EXAMPLE
{p,a,b,c}: {3,1,1,1}, {11,1,1,3}, {17,2,2,3}, {19,1,3,3}, {29,2,3,4}, {43,3,3,5}, {53,1,4,6}, {61,3,4,6}, {67,3,3,7}, {73,1,6,6}, {97,5,6,6}, {109,3,6,8}, {157,2,3,12}, {163,1,9,9}, {193,6,6,11}, {277,4,6,15}, {397,3,8,18}.
CROSSREFS
Cf.
A181786
,
A210338
.
Sequence in context:
A038946
A095280
A085317
*
A033200
A369171
A309581
Adjacent sequences:
A210308
A210309
A210310
*
A210312
A210313
A210314
KEYWORD
nonn
AUTHOR
Zak Seidov
, Mar 20 2012
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 24 16:49 EDT 2024. Contains 371962 sequences. (Running on oeis4.)