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A160407
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First differences of toothpick numbers A160406.
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17
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1, 1, 2, 2, 2, 2, 4, 4, 2, 2, 4, 4, 4, 6, 10, 8, 2, 2, 4, 4, 4, 6, 10, 8, 4, 6, 10, 10, 12, 20, 26, 16, 2, 2, 4, 4, 4, 6, 10, 8, 4, 6, 10, 10, 12, 20, 26, 16, 4, 6, 10, 10, 12, 20, 26, 18, 12, 20, 28, 30, 42
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Number of toothpicks added at n-th stage in the toothpick structure of A160406.
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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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EXAMPLE
| Contribution from Omar E. Pol (info(AT)polprimos.com), Jul 18 2009: (Start)
If written as a triangle:
1;
1;
2,2;
2,2,4,4;
2,2,4,4,4,6,10,8;
2,2,4,4,4,6,10,8,4,6,10,10,12,20,26,16;
2,2,4,4,4,6,10,8,4,6,10,10,12,20,26,16,4,6,10,10,12,20,26,18,12,20,28,30,42;...
(End)
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CROSSREFS
| Cf. A139250, A139251, A153000, A153006, A152980, A160406, A161830, A161831.
Sequence in context: A051464 A151565 A060632 * A007457 A119802 A060369
Adjacent sequences: A160404 A160405 A160406 * A160408 A160409 A160410
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KEYWORD
| nonn
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AUTHOR
| Omar E. Pol (info(AT)polprimos.com), May 23 2009
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EXTENSIONS
| More terms from N. J. A. Sloane, Jul 17 2009
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