login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A115528
Numbers k such that k^2 is the concatenation of two numbers m and 2*m.
2
6, 28571428571428571428572, 42857142857142857142858, 57142857142857142857144, 2247191011235955056179775280898876404494382022471910112360
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,1
LINKS
Table of n, a(n) for n=1..5.
EXAMPLE
6^2 = 3_6.
CROSSREFS
Cf.
A102567
,
A106497
,
A115527
-
A115556
.
Sequence in context:
A182795
A182796
A079683
*
A354995
A270032
A340980
Adjacent sequences:
A115525
A115526
A115527
*
A115529
A115530
A115531
KEYWORD
nonn
,
base
AUTHOR
Giovanni Resta
, Jan 25 2006
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 August 5 10:59 EDT 2024. Contains 374950 sequences. (Running on oeis4.)