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A160171
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First differences of X-toothpicks numbers A160170.
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5
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0, 1, 4, 8, 8, 24, 32, 32, 56, 80, 80, 88, 112, 160, 168, 240, 224, 344, 320, 320, 344, 448, 528, 536, 704, 704, 872, 736, 880, 840, 1024, 1088, 1256, 1328, 1392, 1416, 1440, 1504, 1656
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OFFSET
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0,3
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COMMENTS
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Number of X-toothpicks added at n-th stage to the three-dimensional X-toothpick structure of A160170.
For another version see A170875.
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LINKS
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Table of n, a(n) for n=0..38.
David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.]
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
Index entries for sequences related to toothpick sequences
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CROSSREFS
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X-toothpick sequence: A160170.
Cf. A139250, A139251, A160120, A160121, A160160, A160161, A170875.
Sequence in context: A019197 A066106 A030296 * A195752 A095806 A096872
Adjacent sequences: A160168 A160169 A160170 * A160172 A160173 A160174
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KEYWORD
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nonn
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AUTHOR
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Omar E. Pol, May 03 2009, Dec 13 2010
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EXTENSIONS
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More terms (a(6)-a(38)) based on Email from R. J. Mathar dated on Jan 10 2010.
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STATUS
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approved
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