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A151724
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First differences of A151723.
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17
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0, 1, 6, 6, 18, 6, 18, 30, 42, 6, 18, 30, 54, 54, 42, 78, 90, 6, 18, 30, 54, 54, 54, 102, 150, 102, 42, 78, 138, 162, 114, 186, 186, 6, 18, 30, 54, 54, 54, 102, 150, 102, 54, 102, 174, 222, 198, 246, 342, 198, 42, 78, 138, 162, 162, 258, 402, 354, 162, 186
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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REFERENCES
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S. M. Ulam, On some mathematical problems connected with patterns of growth of figures, pp. 215-224 of R. E. Bellman, ed., Mathematical Problems in the Biological Sciences, Proc. Sympos. Applied Math., Vol. 14, Amer. Math. Soc., 1962 (see Example 6, page 224).
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LINKS
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David Applegate and N. J. A. Sloane, Table of n, a(n) for n = 0..1025
David Applegate, The movie version
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.]
David Applegate and N. J. A. Sloane, Table of n, A151724(n), A151723(n) for n = 0..1025
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
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EXAMPLE
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When written as a triangle:
0,
1,
6,
6,18,
6,18,30,42,
6,18,30,54,54,42,78,90,
6,18,30,54,54,54,102,150,102,42,78,138,162,114,186,186,
...
Right border gives 0 together with A068293. - Omar E. Pol, Mar 19 2015
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CROSSREFS
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Cf. A151723, A170898 (after dividing by 6), A170899, A169759.
Sequence in context: A168460 A315814 A038518 * A335795 A315815 A298026
Adjacent sequences: A151721 A151722 A151723 * A151725 A151726 A151727
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KEYWORD
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nonn
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AUTHOR
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David Applegate and N. J. A. Sloane, Jun 13 2009
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STATUS
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approved
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