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 A160731 First differences of A160730. 4
 2, 2, 4, 6, 6, 6, 12, 14, 12, 6, 12, 14, 16, 18, 32, 34, 20, 6, 12, 14, 16, 18, 32, 34, 24, 18, 32, 38, 44, 62, 92, 82, 36, 6, 12, 14, 16, 18, 32, 34, 24, 18, 32, 38, 44, 62, 92, 82, 40, 18, 32, 38, 44, 62 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..54. 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 From Nathaniel Johnston, Mar 28 2011: (Start) a(n) = 2*A168113(n) a(2^(n+2) + 1) = 4(2^n + 1), n >= 1. (End) EXAMPLE Placing the entries starting from a(4) in a triangle with rows that have length equal to powers of two gives: 6, 6 6, 12, 14, 12 6, 12, 14, 16, 18, 32, 34, 20 6, 12, 14, 16, 18, 32, 34, 24, 18, 32, 38, 44, 62, 92, 82, 36 ... The rows of this triangle tend to 2*A168114. CROSSREFS Cf. A139250, A139251, A160730, A160733, A160737, A160739, A160741. Sequence in context: A075569 A338276 A062722 * A323647 A302928 A098214 Adjacent sequences: A160728 A160729 A160730 * A160732 A160733 A160734 KEYWORD nonn AUTHOR Omar E. Pol, May 25 2009 EXTENSIONS Terms after a(11) from Nathaniel Johnston, Mar 28 2011 STATUS approved

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Last modified June 20 10:31 EDT 2024. Contains 373516 sequences. (Running on oeis4.)