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A161430 Fractal triangle whose virtual skeleton is a polyedge as the Y-toothpick structure of A160120. 5
0, 9, 33, 57, 123, 147 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Number of ON states after n generations of cellular automaton based on the infinite triangular grid.

LINKS

Table of n, a(n) for n=0..5.

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, A161341, A161342, A161343.

Sequence in context: A075812 A256868 A146262 * A175369 A046895 A165392

Adjacent sequences:  A161427 A161428 A161429 * A161431 A161432 A161433

KEYWORD

more,nonn

AUTHOR

Omar E. Pol, Jun 17 2009

STATUS

approved

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Last modified February 21 22:56 EST 2018. Contains 299427 sequences. (Running on oeis4.)