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 A006978 Successive states of the Rule 110 cellular automaton defined by 000, 001, 010, 011, ..., 111 -> 0,1,1,1,0,1,1,0 when started with a single ON cell. (Formerly M2642) 7
 1, 3, 7, 13, 31, 49, 115, 215, 509, 775, 1805, 3359, 7985, 12659, 29655, 54909, 130759, 197581, 460383, 855793, 2038675, 3227319, 7562237, 14149127, 33304077, 50625055, 118279729, 220060275, 523730647, 830325757, 1942439431, 3595423245, 8571017759, 12951092785 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 REFERENCES Marc LeBrun, personal communication. N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS Paolo Xausa, Table of n, a(n) for n = 1..1000 Eric Weisstein's World of Mathematics, Rule 110 Index entries for sequences related to cellular automata FORMULA a(n) = A117999(n-1)/2^(n-1). - Pontus von Brömssen, Oct 18 2022 MATHEMATICA Map[FromDigits[#, 2] &, CellularAutomaton[110, {{1}, 0}, 30]] (* Ben Branman, Dec 28 2010 *) CROSSREFS Cf. A070887, A117999. Sequence in context: A161218 A351318 A068679 * A060424 A119962 A333877 Adjacent sequences: A006975 A006976 A006977 * A006979 A006980 A006981 KEYWORD nonn AUTHOR N. J. A. Sloane. EXTENSIONS More terms from Eric W. Weisstein, Apr 11 2006 Definition clarified by N. J. A. Sloane, Oct 18 2022 STATUS approved

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Last modified September 15 15:47 EDT 2024. Contains 375938 sequences. (Running on oeis4.)