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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A161418 Number of triangles in the Y-toothpick structure after n rounds. 5
0, 0, 0, 0, 6, 6, 12, 12, 24, 30 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

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

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

CROSSREFS

Cf. A139250, A160120, A160124, A161419, A161828, A161836.

Sequence in context: A315784 A315785 A127402 * A124691 A315786 A112437

Adjacent sequences:  A161415 A161416 A161417 * A161419 A161420 A161421

KEYWORD

more,nonn

AUTHOR

Omar E. Pol, Jun 21 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 | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 23 07:20 EDT 2018. Contains 316520 sequences. (Running on oeis4.)