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 A034524 11^n + 1. 17
 2, 12, 122, 1332, 14642, 161052, 1771562, 19487172, 214358882, 2357947692, 25937424602, 285311670612, 3138428376722, 34522712143932, 379749833583242, 4177248169415652, 45949729863572162, 505447028499293772 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Numbers n for which the expression 11^n/(n-1) is an integer. - Paolo P. Lava, May 29 2006 LINKS T. D. Noe, Table of n, a(n) for n = 0..200 Index entries for linear recurrences with constant coefficients, signature (12, -11). FORMULA G.f.: 1/(1-x)+1/(1-11*x). E.g.f.: e^x+e^(11*x). - Mohammad K. Azarian, Jan 02 2009 MATHEMATICA LinearRecurrence[{12, -11}, {2, 12}, 18] (* Ray Chandler, Aug 26 2015 *) PROG (Sage) [sigma(11, n)for n in range(0, 18)] # - Zerinvary Lajos, Jun 04 2009 (PARI) a(n)=11^n+1 \\ Charles R Greathouse IV, Sep 24 2015 CROSSREFS Cf. A000051, A034472, A052539, A034474, A062394, A034491, A062395, A062396, A062397, A007689, A063376, A063481, A074600-A074624, A178248, A228081. Sequence in context: A221279 A165300 A028359 * A051782 A048173 A058349 Adjacent sequences:  A034521 A034522 A034523 * A034525 A034526 A034527 KEYWORD nonn,easy AUTHOR STATUS approved

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Last modified January 26 23:54 EST 2022. Contains 350601 sequences. (Running on oeis4.)