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A160158 Toothpick sequence starting from a segment of length 4 formed by two toothpicks. 5
0, 2, 4, 8, 16, 24, 28, 36, 48, 56, 64, 80, 104, 124, 136, 156, 176, 184, 192, 208, 232, 252, 268, 296, 328, 352, 384, 440, 508, 560, 600, 652, 688, 696, 704, 720, 744, 764, 780, 808, 840, 864, 896, 952, 1020, 1072, 1116, 1176, 1224, 1248, 1280, 1336, 1404 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The sequence gives the number of toothpicks in the sieve after n-th stage.

LINKS

Table of n, a(n) for n=0..52.

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, A160406, A160730, A160732, A160736, A160738, A160740.

Sequence in context: A108567 A261890 A072874 * A010072 A318654 A305656

Adjacent sequences:  A160155 A160156 A160157 * A160159 A160160 A160161

KEYWORD

nonn

AUTHOR

Omar E. Pol, May 29 2009

EXTENSIONS

Extended beyond a(13) by R. J. Mathar, Jun 01 2009

STATUS

approved

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Last modified October 15 21:06 EDT 2018. Contains 316237 sequences. (Running on oeis4.)