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Search: id:A161210
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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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+0
5
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OFFSET
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0,3
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COMMENT
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The sequence gives the number of toothpicks after n rounds. A161211 (the first differences) gives the number added at the n-th round.
This sieve is a three-dimensional version of the toothpick sieve 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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CROSSREFS
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Cf. A139250, A152980, A153006, A160160, A161211, A161212, A161214, A161216.
Sequence in context: A143630 A001843 A033808 this_sequence A154772 A156859 A146931
Adjacent sequences: A161207 A161208 A161209 this_sequence A161211 A161212 A161213
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KEYWORD
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more,nonn
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AUTHOR
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Omar E. Pol (info(AT)polprimos.com), Jun 06 2009
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