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

 

Logo

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A170866 a(0) = 1, a(1) = 1; a(2^i + j) = 2a(j) + 3a(j + 1) for 0 <= j < 2^i. 0
1, 1, 5, 17, 5, 17, 61, 49, 5, 17, 61, 49, 61, 217, 269, 113, 5, 17, 61, 49, 61, 217, 269, 113, 61, 217, 269, 281, 773, 1241, 877, 241, 5, 17, 61, 49, 61, 217, 269, 113, 61, 217, 269, 281, 773, 1241, 877, 241, 61, 217, 269, 281, 773, 1241, 877, 409, 773, 1241, 1381, 2881, 5269 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..60.

David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, 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.]

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

CROSSREFS

Sequence in context: A277534 A090592 A093558 * A125636 A156323 A286816

Adjacent sequences:  A170863 A170864 A170865 * A170867 A170868 A170869

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 16 21:37 EST 2019. Contains 319206 sequences. (Running on oeis4.)