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A161210 Toothpick sequence starting at the outside corner of an infinite cube from which protudes a half toothpick. 4
0, 1, 3, 7, 14, 21, 28 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

The sequence gives the number of toothpicks after n rounds. A161211 (the first differences) gives the number added at the n-th round.

This structure is a three-dimensional version of the toothpick structure of A153006.

Toothpicks are placed following a rotation of axes: x,y,z,x,y,z,... and so on.

See A139250 and A160160 for more information about the toothpick sequences.

LINKS

Table of n, a(n) for n=0..6.

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, A152980, A153006, A160160, A161211, A161212, A161214, A161216.

Sequence in context: A267448 A001843 A033808 * A256059 A258434 A249341

Adjacent sequences:  A161207 A161208 A161209 * A161211 A161212 A161213

KEYWORD

more,nonn

AUTHOR

Omar E. Pol, Jun 06 2009

STATUS

approved

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Last modified February 20 16:11 EST 2018. Contains 299380 sequences. (Running on oeis4.)