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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A170870 a(0) = 1, a(1) = 2; a(2^i + j) = a(j) + 3a(j + 1) for 0 <= j < 2^i. 0
1, 2, 7, 23, 7, 23, 76, 44, 7, 23, 76, 44, 76, 251, 208, 65, 7, 23, 76, 44, 76, 251, 208, 65, 76, 251, 208, 272, 829, 875, 403, 86, 7, 23, 76, 44, 76, 251, 208, 65, 76, 251, 208, 272, 829, 875, 403, 86, 76, 251, 208, 272, 829, 875, 403, 293, 829, 875, 1024, 2759, 3454, 2084 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..61.

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: A153523 A153551 A125285 * A122631 A269313 A147969

Adjacent sequences:  A170867 A170868 A170869 * A170871 A170872 A170873

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 23 18:46 EDT 2018. Contains 316530 sequences. (Running on oeis4.)