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A172307 a(n) = A172305(n)/2. 6
0, 1, 2, 4, 4, 4, 8, 8, 4, 8, 12, 12, 16, 12 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..13.

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, A172304, A172305, A172306, A172308, A172309, A172310, A172311, A172312, A172313.

Sequence in context: A023820 A225355 A117726 * A108039 A103228 A076340

Adjacent sequences:  A172304 A172305 A172306 * A172308 A172309 A172310

KEYWORD

more,nonn

AUTHOR

Omar E. Pol, Feb 06 2010

STATUS

approved

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Last modified March 20 23:22 EDT 2019. Contains 321354 sequences. (Running on oeis4.)