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 A161207 First differences of A161206. 21
 1, 2, 4, 6, 8, 10, 12, 14, 12, 12, 18, 24, 30, 30, 28, 30, 20, 12, 18, 26, 34, 42, 50, 56, 54, 44, 48, 64, 82, 80, 68, 66, 36, 12, 18, 26, 34, 42, 50, 58, 58, 54, 66, 90, 114, 126, 122, 120, 102, 60, 48, 70, 94, 118, 142, 160, 162, 136, 130, 160, 204, 198, 160, 142, 68, 12 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Number of V-toothpicks added to the V-toothpick structure at the n-th round. LINKS Table of n, a(n) for n=1..66. 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.] N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS CROSSREFS Cf. A139250, A139251, A160121, A160173, A161206, A161329, A161331. Sequence in context: A274611 A319808 A055956 * A280877 A289509 A336735 Adjacent sequences: A161204 A161205 A161206 * A161208 A161209 A161210 KEYWORD nonn AUTHOR Omar E. Pol, Jun 08 2009 EXTENSIONS More terms from R. J. Mathar, Jan 21 2010 STATUS approved

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Last modified June 17 12:36 EDT 2024. Contains 373445 sequences. (Running on oeis4.)