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A160801 First differences of A160800. 5
1, 2, 4, 2, 1, 2, 3, 1, 1, 2, 3, 3, 3, 5, 5, 2, 1, 2, 3, 2, 2, 4, 6, 5, 3, 5, 5, 2, 2, 4, 6, 1, 2, 3, 2, 2, 4, 6, 5, 3, 5, 5, 2, 2, 4, 6, 5, 4, 7, 8, 6, 8, 14, 17, 13, 10, 9, 8, 3, 3, 4, 5, 6, 7, 8, 7, 6, 8, 11, 14, 17, 19, 10 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Number of toothpicks added to the spiral at the n-th stage.

LINKS

Table of n, a(n) for n=1..73.

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. A000045, A139250, A139251, A160426, A160427, A160800.

Sequence in context: A059317 A220886 A087266 * A177002 A079046 A079045

Adjacent sequences:  A160798 A160799 A160800 * A160802 A160803 A160804

KEYWORD

nonn

AUTHOR

Omar E. Pol, May 26 2009

EXTENSIONS

Terms after a(32) from Nathaniel Johnston, Mar 30 2011

STATUS

approved

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Last modified September 21 22:14 EDT 2014. Contains 247025 sequences.