login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A183127 Number of toothpicks added at n-th stage to the toothpick structure of A183126. 2

%I

%S 0,1,6,16,16,40,16,40,40,112,16,40,40,112,40,112,112,328,16,40,40,112,

%T 40,112,112,328,40,112,112,328,112,328,328,976,16,40,40,112,40,112,

%U 112,328,40,112,112,328,112,328

%N Number of toothpicks added at n-th stage to the toothpick structure of A183126.

%C Essentially the first differences of A183126.

%H David Applegate, Omar E. Pol and N. J. A. Sloane, <a href="http://neilsloane.com/doc/tooth.pdf">The Toothpick Sequence and Other Sequences from Cellular Automata</a>, 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.]

%H N. J. A. Sloane, <a href="/wiki/Catalog_of_Toothpick_and_CA_Sequences_in_OEIS">Catalog of Toothpick and Cellular Automata Sequences in the OEIS</a>

%F a(n) = 4*(1 + 3^A000120(n-2)), n >= 3. - Nathaniel Johnston, Apr 06 2011

%Y Cf. A139250, A139251, A160173, A161411, A183126, A183149.

%K nonn

%O 0,3

%A _Omar E. Pol_, Mar 28 2011

%E Terms a(0) - a(10) confirmed and terms a(11) - a(35) added by _John W. Layman_, Mar 30 2011

%E a(36) - a(47) from _Nathaniel Johnston_, Apr 06 2011

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 20 05:07 EST 2019. Contains 329323 sequences. (Running on oeis4.)