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A160425 a(n) = number of grid points that are covered after n-th rounds of A160120. 2
0, 4, 10, 19, 31, 40 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..5.

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, A147614, A160120, A160121, A160128.

Sequence in context: A219965 A008038 A301248 * A152946 A162505 A025720

Adjacent sequences:  A160422 A160423 A160424 * A160426 A160427 A160428

KEYWORD

more,nonn

AUTHOR

Omar E. Pol, Jun 01 2009

STATUS

approved

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Last modified November 12 05:52 EST 2019. Contains 329051 sequences. (Running on oeis4.)