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A162794 Number of toothpicks added to the toothpick structure A139250 at the n-th even round. 6
0, 2, 4, 8, 8, 8, 12, 28, 16, 8, 12, 28, 20, 28, 40, 88, 32, 8, 12, 28, 20, 28, 40, 88, 36, 28, 40, 88, 56, 92, 140, 256, 64, 8, 12, 28, 20, 28, 40, 88, 36, 28, 40, 88, 56, 92, 140, 256, 68, 28, 40, 88, 56, 92, 140, 256, 88, 92, 140, 260, 172, 296, 488, 704, 128, 8, 12, 28, 20, 28 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Note that these toothpicks are orthogonal to the initial toothpick in the sieve.

A bisection of A139251.

LINKS

Table of n, a(n) for n=0..69.

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

Cf. A139250, A139251, A159791, A159792, A162793, A162795, A162796, A162797.

Sequence in context: A129279 A008496 A178573 * A172305 A187221 A129280

Adjacent sequences:  A162791 A162792 A162793 * A162795 A162796 A162797

KEYWORD

nonn

AUTHOR

Omar E. Pol, Jul 14 2009

EXTENSIONS

Extended by R. J. Mathar, Sep 27 2009

STATUS

approved

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Last modified October 22 05:29 EDT 2019. Contains 328315 sequences. (Running on oeis4.)