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 A017053 a(n) = 7*n + 6. 15
 6, 13, 20, 27, 34, 41, 48, 55, 62, 69, 76, 83, 90, 97, 104, 111, 118, 125, 132, 139, 146, 153, 160, 167, 174, 181, 188, 195, 202, 209, 216, 223, 230, 237, 244, 251, 258, 265, 272, 279, 286, 293, 300, 307, 314, 321, 328, 335, 342, 349, 356, 363, 370, 377, 384 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..5000 Tanya Khovanova, Recursive Sequences INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 955 Index entries for linear recurrences with constant coefficients, signature (2,-1). FORMULA a(n) = 2*a(n-1) - a(n-2). - Wesley Ivan Hurt, Mar 17 2023 G.f.: (6+x)/(1-x)^2. - Wesley Ivan Hurt, Dec 28 2023 MATHEMATICA Array[7*#+6&, 100, 0] (* Vladimir Joseph Stephan Orlovsky, Dec 14 2009 *) LinearRecurrence[{2, -1}, {6, 13}, 60] (* Harvey P. Dale, Apr 13 2022 *) PROG (Magma) [7*n + 6: n in [0..60]]; // Vincenzo Librandi, Jun 18 2011 (PARI) a(n)=7*n+6 \\ Charles R Greathouse IV, Jul 10 2016 CROSSREFS Cf. A008589, A016993, A017005, A017017. Sequence in context: A031485 A004919 A172330 * A046040 A330177 A227359 Adjacent sequences: A017050 A017051 A017052 * A017054 A017055 A017056 KEYWORD nonn,easy AUTHOR N. J. A. Sloane STATUS approved

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Last modified May 29 08:50 EDT 2024. Contains 372926 sequences. (Running on oeis4.)