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A161210
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Toothpick sequence starting at the outside corner of an infinite cube from which protudes a half toothpick.
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4
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OFFSET
| 0,3
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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.
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LINKS
| 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
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CROSSREFS
| Cf. A139250, A152980, A153006, A160160, A161211, A161212, A161214, A161216.
Sequence in context: A190700 A001843 A033808 * A154772 A156859 A173209
Adjacent sequences: A161207 A161208 A161209 * A161211 A161212 A161213
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KEYWORD
| more,nonn
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AUTHOR
| Omar E. Pol (info(AT)polprimos.com), Jun 06 2009
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