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A161828
Number of rhombuses in the Y-toothpick structure of
A160120
after n rounds.
10
0, 0, 3, 3, 9, 9, 15, 21, 33, 39
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..9.
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.
A139250
,
A160120
,
A160124
,
A161419
,
A161418
,
A161836
.
Sequence in context:
A204099
A062234
A168329
*
A219128
A217964
A086739
Adjacent sequences:
A161825
A161826
A161827
*
A161829
A161830
A161831
KEYWORD
more
,
nonn
AUTHOR
Omar E. Pol
, Jun 21 2009
STATUS
approved
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Last modified April 25 09:24 EDT 2024. Contains 371967 sequences. (Running on oeis4.)