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 A160018 A175099 with a(3) changed from 0 to 1. 1
 0, 0, 0, 1, 1, 0, 0, 2, 3, 0, 0, 2, 2, 0, 0, 4, 7, 0, 0, 2, 2, 0, 0, 4, 6, 0, 0, 4, 4, 0, 0, 8, 15, 0, 0, 2, 2, 0, 0, 4, 6, 0, 0, 4, 4, 0, 0, 8, 14, 0, 0, 4, 4, 0, 0, 8, 12, 0, 0, 8, 8, 0, 0, 16, 31, 0, 0, 2, 2, 0, 0, 4, 6, 0, 0, 4, 4, 0, 0, 8, 14, 0, 0, 4, 4, 0, 0, 8, 12, 0, 0, 8, 8, 0, 0, 16, 30, 0, 0, 4, 4, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,8 LINKS Table of n, a(n) for n=0..101. 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 FORMULA a(n) = a(1) = 0; for k >= 1, a(2^k) = 2^(k-1)-1, a(2^k+i) = 2*a(i) for 1 <= i < 2^k. CROSSREFS Cf. A160125, A175098, A175099. Sequence in context: A319753 A078332 A097109 * A175099 A151867 A262563 Adjacent sequences: A160015 A160016 A160017 * A160019 A160020 A160021 KEYWORD nonn AUTHOR N. J. A. Sloane, Feb 07 2010 STATUS approved

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Last modified September 22 08:35 EDT 2023. Contains 365519 sequences. (Running on oeis4.)