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A161427 First differences of A161426. 2
1, 3, 3, 7, 5, 7, 9, 17, 11, 7 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Number of Y-toothpicks added to the sieve at the n-th round.

LINKS

Table of n, a(n) for n=1..10.

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

David Applegate, The movie version

CROSSREFS

Cf. A139251, A152980, A160121, A161426, A161831.

Sequence in context: A209085 A086799 A218388 * A098688 A129266 A129527

Adjacent sequences:  A161424 A161425 A161426 * A161428 A161429 A161430

KEYWORD

more,nonn

AUTHOR

Omar E. Pol and David Applegate, Jun 20 2009

STATUS

approved

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Last modified February 25 12:44 EST 2018. Contains 299654 sequences. (Running on oeis4.)