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A161412 V-toothpick sequence starting at the corner of an infinite square from which protudes a half toothpick with an angle = Pi/6. 3
0, 1, 2, 3, 5, 9, 12, 15, 19, 25, 29, 34, 39, 49, 58, 63 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

The sequence gives the number of V-toothpicks in the structure after n rounds. A161413 (the first differences) gives the number added at the n-th round.

LINKS

Table of n, a(n) for n=0..15.

David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

CROSSREFS

V-toothpick sequence: A161206.

Cf. A139250, A160120, A160406, A161328, A161413.

Sequence in context: A097683 A141403 A124204 * A099420 A184794 A144728

Adjacent sequences:  A161409 A161410 A161411 * A161413 A161414 A161415

KEYWORD

more,nonn

AUTHOR

Omar E. Pol, Jun 10 2009

STATUS

approved

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Last modified November 15 15:59 EST 2018. Contains 317239 sequences. (Running on oeis4.)