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 A126978 a(n) = 104*n + 9977. 5
 9977, 10081, 10185, 10289, 10393, 10497, 10601, 10705, 10809, 10913, 11017, 11121, 11225, 11329, 11433, 11537, 11641, 11745, 11849, 11953, 12057, 12161, 12265, 12369, 12473, 12577, 12681, 12785, 12889, 12993, 13097, 13201, 13305, 13409, 13513, 13617 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Langton's Ant Superhighway, the start point (9977th iteration, J. Propp) and the period length for the Superhighway (104). LINKS B. D. Swan, Table of n, a(n) for n = 0..10000 C. Langton, Studying Artificial Life with Cellular Automata, Physica D: Nonlinear Phenomena, vol. 22, pp. 120-149, 1986. Ed Pegg Jr, 2D Turing Machines . James Propp, Further Ant-ics, Mathematical Intelligencer, 16 pp. 37-42, 1994. P. Sarkar, A Brief History of Cellular Automata, ACM Computing Surveys. Vol. 32 No. Mar 01 2000. S. Wolfram, 2D Turing Machines . Index entries for linear recurrences with constant coefficients, signature (2, -1). FORMULA a(0)=9977, a(1)=10081, a(n) = 2*a(n-1)-a(n-2). - Harvey P. Dale, Dec 16 2011 G.f.: (9977-9873*x)/(1-x)^2. - Vincenzo Librandi, Sep 10 2015 MATHEMATICA 104*Range[0, 40]+9977 (* or *) LinearRecurrence[{2, -1}, {9977, 10081}, 40] (* Harvey P. Dale, Dec 16 2011 *) CoefficientList[Series[(9977 - 9873 x)/(1 - x)^2, {x, 0, 40}], x] (* Vincenzo Librandi, Sep 10 2015 *) PROG (MAGMA) [104*n + 9977: n in [0..40]]; // Vincenzo Librandi, Sep 10 2015 (PARI) a(n)=104*n+9977 \\ Charles R Greathouse IV, Oct 07 2015 CROSSREFS Cf. A102127, A102358, A102369, A126979, A126980. Sequence in context: A031858 A254975 A182696 * A188790 A190832 A043528 Adjacent sequences:  A126975 A126976 A126977 * A126979 A126980 A126981 KEYWORD easy,nonn AUTHOR Robert H Barbour, Mar 20 2007, Jun 12 2007 STATUS approved

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Last modified August 11 08:50 EDT 2020. Contains 336422 sequences. (Running on oeis4.)