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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A161331 First differences of A161330. 12
0, 2, 6, 6, 6, 18, 6, 18, 18, 18, 30, 18, 30, 42, 6, 18, 18, 30, 54, 30, 78, 42, 54, 78, 42, 66, 78, 18, 42, 42, 54, 90, 66, 126, 90, 90, 102, 66, 78, 90, 90, 90, 54, 66, 114, 78, 126, 126, 102, 102, 138, 102, 162, 102, 114, 162, 126, 162, 114, 102, 102, 126, 186, 186, 150, 138, 126, 162, 162, 186, 198, 114, 114, 162 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Number of E-toothpicks added to the snowflake structure at n-th round.

LINKS

David Applegate, Table of n, a(n) for n = 0..1000

David Applegate, The movie version

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, A139251, A160121, A160173, A161328, A161329, A161330.

Sequence in context: A071888 A117217 A260930 * A120627 A089879 A087651

Adjacent sequences:  A161328 A161329 A161330 * A161332 A161333 A161334

KEYWORD

nonn

AUTHOR

Omar E. Pol, Jun 07 2009

EXTENSIONS

More terms from David Applegate, Dec 13 2012

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 February 24 22:41 EST 2018. Contains 299627 sequences. (Running on oeis4.)