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 A182635 Number of toothpicks added at n-th stage to the toothpick structure of A182634. 8
 0, 1, 2, 4, 4, 4, 8, 12, 8, 4, 8, 16, 20, 16, 20, 28, 16, 4, 8, 16, 20, 20, 28, 44, 44, 24, 20, 40, 56, 48, 52, 64, 32, 4, 8, 16, 20, 20, 28, 44, 44, 28, 28, 52, 76, 76, 76 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS First differences of A182634. First differs from A139251 at a(11). LINKS Table of n, a(n) for n=0..46. 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 Index entries for sequences related to toothpick sequences Index entries for sequences related to cellular automata FORMULA a(n) = A182633(n)/3. EXAMPLE Contribution from Omar E. Pol, Dec 06 2012 (Start): When written as an irregular triangle begins: 0; 1; 2; 4,4; 4,8,12,8; 4,8,16,20,16,20,28,16; 4,8,16,20,20,28,44,44,24,20,40,56,48,52,64,32; 4,8,16,20,20,28,44,44,28,28,52,76,76,76,... (End) CROSSREFS Cf. A139250, A139251, A160121, A161207, A161645, A182633, A182634, A194445. Sequence in context: A160809 A139251 A342272 * A188346 A309690 A173531 Adjacent sequences: A182632 A182633 A182634 * A182636 A182637 A182638 KEYWORD nonn,more AUTHOR Omar E. Pol, Dec 08 2010 STATUS approved

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Last modified May 21 12:47 EDT 2024. Contains 372736 sequences. (Running on oeis4.)