

A161412


Vtoothpick 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
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OFFSET

0,3


COMMENTS

The sequence gives the number of Vtoothpicks in the structure after n rounds. A161413 (the first differences) gives the number added at the nth 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

Vtoothpick 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



