This site is supported by donations to The OEIS Foundation.



Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 4500 articles have referenced us, often saying "we would not have discovered this result without the OEIS".

(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A160408 Toothpick pyramid (see Comments lines for definition). 7


%S 0,1,2,4,8,12,16,20,24,32,48,64,72,76,80,88

%N Toothpick pyramid (see Comments lines for definition).

%C The toothpick pyramid is a three-dimensional version of the toothpick triangle A160406.

%C The sequence gives the number of toothpicks after n rounds. A160409 (the first differences) gives the number added at the n-th round.

%C See also the entry A139250 for more information about the toothpick sequences.

%H David Applegate, Omar E. Pol and N. J. A. Sloane, <a href="http://neilsloane.com/doc/tooth.pdf">The Toothpick Sequence and Other Sequences from Cellular Automata</a>

%H N. J. A. Sloane, <a href="/wiki/Catalog_of_Toothpick_and_CA_Sequences_in_OEIS">Catalog of Toothpick and Cellular Automata Sequences in the OEIS</a>

%Y Cf. A139250, A139251, A160160, A160406, A160407, A160409.

%K more,nonn

%O 0,3

%A _Omar E. Pol_, May 23 2009, Jun 06 2009

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified November 25 10:53 EST 2015. Contains 264417 sequences.