login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A115527
Numbers k such that the concatenation of k with 2*k gives a square.
29
3, 8163265306122448979592, 18367346938775510204082, 32653061224489795918368, 504986744097967428355005681100871102133568993813912384800
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,1
LINKS
Table of n, a(n) for n=1..5.
EXAMPLE
3_6 = 6^2.
CROSSREFS
Cf.
A102567
,
A106497
,
A115528
-
A115556
.
Sequence in context:
A058471
A068740
A058473
*
A050920
A001231
A089418
Adjacent sequences:
A115524
A115525
A115526
*
A115528
A115529
A115530
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 March 19 04:26 EDT 2024. Contains 370952 sequences. (Running on oeis4.)