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 A168484 Numbers that are congruent to {2, 3, 5, 7} mod 11. 1
 2, 3, 5, 7, 13, 14, 16, 18, 24, 25, 27, 29, 35, 36, 38, 40, 46, 47, 49, 51, 57, 58, 60, 62, 68, 69, 71, 73, 79, 80, 82, 84, 90, 91, 93, 95, 101, 102, 104, 106, 112, 113, 115, 117, 123, 124, 126, 128, 134, 135, 137, 139, 145, 146, 148, 150, 156, 157, 159, 161, 167, 168 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 Index entries for linear recurrences with constant coefficients, signature (1,0,0,1,-1). FORMULA From R. J. Mathar, Mar 21 2010: (Start) G.f.: x*(2 + x + 2*x^2 + 2*x^3 + 4*x^4)/ ((1+x)*(x^2+1)*(x-1)^2). a(n) = a(n-1) + a(n-4) - a(n-5) for n>5. (End) a(n) = (22*n - 21 - 5*i^(2*n) - (3-5*i)*i^(-n) - (3+5*i)*i^n)/8 where i = sqrt(-1). - Wesley Ivan Hurt, Jun 07 2016 E.g.f.: (1/4)*(16 + (11*x -13)*cosh(x) + (11*x - 8)*sinh(x) - 3*cos(x) + 5*sin(x)). - G. C. Greubel, Jul 23 2016 MAPLE A168484:=n->(22*n-21-5*I^(2*n)-(3-5*I)*I^(-n)-(3+5*I)*I^n)/8: seq(A168484(n), n=1..100); # Wesley Ivan Hurt, Jun 07 2016 MATHEMATICA CoefficientList[Series[(2 + x + 2 x^2 + 2 x^3 + 4 x^4)/((1 + x) (x^2+1) (x-1)^2), {x, 0, 100}], x] (* Vincenzo Librandi, Sep 24 2014 *) Select[Range[168], MemberQ[{2, 3, 5, 7}, Mod[#, 11]]&] (* Ray Chandler, Jul 07 2015 *) LinearRecurrence[{1, 0, 0, 1, -1}, {2, 3, 5, 7, 13}, 62] (* Ray Chandler, Jul 07 2015 *) PROG (MAGMA) [n : n in [0..200] | n mod 11 in [2, 3, 5, 7]]; // Wesley Ivan Hurt, Jun 07 2016 CROSSREFS Sequence in context: A264731 A262350 A228891 * A217907 A031344 A004682 Adjacent sequences:  A168481 A168482 A168483 * A168485 A168486 A168487 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Nov 28 2009 STATUS approved

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Last modified August 18 07:11 EDT 2019. Contains 326072 sequences. (Running on oeis4.)