login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A161211
First differences of
A161210
.
1
1, 2, 4, 7, 7, 7
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,2
COMMENTS
Number of toothpicks added at the n-th round.
LINKS
Table of n, a(n) for n=1..6.
David Applegate, Omar E. Pol and N. J. A. Sloane,
The Toothpick Sequence and Other Sequences from Cellular Automata
, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.]
N. J. A. Sloane,
Catalog of Toothpick and Cellular Automata Sequences in the OEIS
CROSSREFS
Cf.
A139251
,
A152980
,
A160161
,
A161210
,
A161213
,
A161215
,
A161217
.
Sequence in context:
A126786
A154614
A342616
*
A276807
A363166
A161368
Adjacent sequences:
A161208
A161209
A161210
*
A161212
A161213
A161214
KEYWORD
more
,
nonn
AUTHOR
Omar E. Pol
, Jun 06 2009
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 19 02:01 EDT 2024. Contains 371782 sequences. (Running on oeis4.)