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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A170852 G.f.: Prod_{k >= 2} (1 + 3x^(2^k-1) + 3x^(2^k)). 2
1, 0, 0, 3, 3, 0, 0, 3, 3, 0, 9, 18, 9, 0, 0, 3, 3, 0, 9, 18, 9, 0, 9, 18, 9, 27, 81, 81, 27, 0, 0, 3, 3, 0, 9, 18, 9, 0, 9, 18, 9, 27, 81, 81, 27, 0, 9, 18, 9, 27, 81, 81, 27, 27, 81, 81, 108, 324, 486, 324, 81, 0, 0, 3, 3, 0, 9, 18, 9, 0, 9, 18, 9, 27, 81, 81, 27, 0, 9, 18, 9, 27, 81, 81, 27 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..84.

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

Sequence in context: A269707 A109247 A021307 * A245320 A152893 A297978

Adjacent sequences:  A170849 A170850 A170851 * A170853 A170854 A170855

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 02 2010

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 18 07:58 EDT 2018. Contains 316307 sequences. (Running on oeis4.)