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A161828 Number of rhombuses in the Y-toothpick structure of A160120 after n rounds. 10
0, 0, 3, 3, 9, 9, 15, 21, 33, 39 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..9.

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

Cf. A139250, A160120, A160124, A161419, A161418, A161836.

Sequence in context: A204099 A062234 A168329 * A219128 A217964 A086739

Adjacent sequences:  A161825 A161826 A161827 * A161829 A161830 A161831

KEYWORD

more,nonn

AUTHOR

Omar E. Pol, Jun 21 2009

STATUS

approved

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Last modified October 24 00:04 EDT 2018. Contains 316541 sequences. (Running on oeis4.)