login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A294688
Palindromes in Narayana's cows sequence (
A000930
).
1
1, 2, 3, 4, 6, 9, 88, 595
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,2
COMMENTS
595 is probably the last term.
LINKS
Table of n, a(n) for n=1..8.
MAPLE
a := proc(n) if n < 4 then n else
simplify(hypergeom([-n/3, (1-n)/3, (-1-n)/3], [-n/2, (-1-n)/2], -27/4));
convert(%, base, 10); ListTools:-Reverse(%);
if %% = % then add(%[k]*10^(k-1), k=1..nops(%)) else NULL fi fi end:
seq(a(n), n=1..200); #
Peter Luschny
, Nov 07 2017
CROSSREFS
Cf.
A000930
,
A002113
,
A045504
,
A055391
.
Sequence in context:
A295394
A081419
A108858
*
A094859
A267102
A122397
Adjacent sequences:
A294685
A294686
A294687
*
A294689
A294690
A294691
KEYWORD
nonn
,
base
,
more
,
hard
AUTHOR
Chai Wah Wu
, Nov 06 2017
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 18:17 EDT 2024. Contains 371962 sequences. (Running on oeis4.)