A161207 - OEIS

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A161207

First differences of A161206.

21

1, 2, 4, 6, 8, 10, 12, 14, 12, 12, 18, 24, 30, 30, 28, 30, 20, 12, 18, 26, 34, 42, 50, 56, 54, 44, 48, 64, 82, 80, 68, 66, 36, 12, 18, 26, 34, 42, 50, 58, 58, 54, 66, 90, 114, 126, 122, 120, 102, 60, 48, 70, 94, 118, 142, 160, 162, 136, 130, 160, 204, 198, 160, 142, 68, 12

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

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

LINKS

Table of n, a(n) for n=1..66.

David Applegate, The movie version

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, A160121, A160173, A161206, A161329, A161331.

Sequence in context: A274611 A319808 A055956 * A280877 A289509 A336735

Adjacent sequences: A161204 A161205 A161206 * A161208 A161209 A161210

KEYWORD

nonn

AUTHOR

Omar E. Pol, Jun 08 2009

EXTENSIONS

More terms from R. J. Mathar, Jan 21 2010

STATUS

approved