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A161413 First differences of A161412. 1
1, 1, 1, 2, 4, 3, 3, 4, 6, 4, 5, 5, 10, 9, 5 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Number of V-toothpicks added to the structure at the n-th round.

LINKS

Table of n, a(n) for n=1..15.

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. A139251, A160121, A160407, A161207, A161329, A161412.

Sequence in context: A137363 A110549 A174574 * A201049 A303354 A227418

Adjacent sequences:  A161410 A161411 A161412 * A161414 A161415 A161416

KEYWORD

more,nonn

AUTHOR

Omar E. Pol, Jun 10 2009

STATUS

approved

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Last modified January 21 11:00 EST 2019. Contains 319351 sequences. (Running on oeis4.)