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A170843 G.f.: Product_{k>=2} (1 + 2x^(2^k-1) + 3x^(2^k)). 0
1, 0, 0, 2, 3, 0, 0, 2, 3, 0, 4, 12, 9, 0, 0, 2, 3, 0, 4, 12, 9, 0, 4, 12, 9, 8, 36, 54, 27, 0, 0, 2, 3, 0, 4, 12, 9, 0, 4, 12, 9, 8, 36, 54, 27, 0, 4, 12, 9, 8, 36, 54, 27, 8, 36, 54, 43, 96, 216, 216, 81, 0, 0, 2, 3, 0, 4, 12, 9, 0, 4, 12, 9, 8, 36, 54, 27, 0, 4, 12, 9, 8, 36, 54, 27, 8, 36, 54, 43 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..88.

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

CROSSREFS

Sequence in context: A175099 A151867 A262563 * A292596 A011023 A284610

Adjacent sequences:  A170840 A170841 A170842 * A170844 A170845 A170846

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jan 02 2010

STATUS

approved

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Last modified April 14 07:59 EDT 2021. Contains 342946 sequences. (Running on oeis4.)