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 A182842 a(n) = A182841(n+2)/2. 2
 2, 4, 7, 8, 7, 12, 19, 16, 7, 12, 23, 32, 27, 28, 43, 32, 7, 12, 23, 32, 31, 40, 63, 72, 43, 28, 55, 84, 79, 72, 99, 64, 7, 12, 23, 32, 31, 40, 63, 72, 47, 40, 71, 112, 119, 112, 143, 152, 75, 28, 55, 84, 91, 108, 163, 204, 151, 88, 131, 204, 207, 180, 219, 128 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Olaf Voß, Table of n, a(n) for n = 0..998 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 Olaf Voß, Toothpick structures on hexagonal net EXAMPLE From Omar E. Pol, Nov 01 2014: (Start) When written as an irregular triangle with row lengths A011782: 2; 4; 7, 8; 7, 12, 19, 16; 7, 12, 23, 32, 27, 28, 43, 32; 7, 12, 23, 32, 31, 40, 63, 72, 43, 28, 55, 84, 79, 72, 99, 64; 7, 12, 23, 32, 31, 40, 63, 72, 47, 40, 71, 112, 119, 112, 143, 152, 75, 28, 55, 84, 91, 108, 163, 204, 151, 88, 131, 204, 207, 180, 219, 128; The right border gives the even powers of 2, at least up a(2^9-1). (End) CROSSREFS Cf. A139250, A139251, A151724, A182633, A182840, A182841. Sequence in context: A166928 A237199 A092577 * A009282 A141745 A301936 Adjacent sequences:  A182839 A182840 A182841 * A182843 A182844 A182845 KEYWORD nonn,tabf AUTHOR Omar E. Pol, Dec 11 2010 EXTENSIONS More terms from Olaf Voß, Dec 24 2010 Wiki link added by Olaf Voß, Jan 14 2011 STATUS approved

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Last modified February 25 05:15 EST 2020. Contains 332217 sequences. (Running on oeis4.)