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 A008772 Expansion of (1+x^11)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)). 1
 1, 1, 2, 3, 5, 6, 9, 11, 15, 18, 23, 28, 35, 41, 50, 59, 70, 81, 95, 109, 126, 143, 163, 184, 208, 232, 260, 289, 321, 354, 391, 429, 471, 514, 561, 610, 663, 717, 776, 837, 902, 969, 1041, 1115, 1194, 1275, 1361, 1450, 1544, 1640, 1742, 1847, 1957, 2070, 2189, 2311, 2439, 2570, 2707 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..2000 Index entries for linear recurrences with constant coefficients, signature (2,-1,1,-1,-1,1,-1,2,-1). FORMULA G.f.: (1+x^11)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)). MAPLE seq(coeff(series((1+x^11)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)), x, n+1), x, n), n = 0 .. 60); # G. C. Greubel, Sep 10 2019 MATHEMATICA CoefficientList[Series[(1+x^11)/(1-x)/(1-x^2)/(1-x^3)/(1-x^4), {x, 0, 60}], x] (* Wesley Ivan Hurt, Apr 08 2017 *) Join[{1, 1}, LinearRecurrence[{2, -1, 1, -1, -1, 1, -1, 2, -1}, {2, 3, 5, 6, 9, 11, 15, 18, 23}, 60]] (* Vincenzo Librandi, Apr 09 2017 * PROG (PARI) Vec((1+x^11)/(1-x)/(1-x^2)/(1-x^3)/(1-x^4) + O(x^60)) \\ Michel Marcus, Apr 08 2017 (MAGMA) R:=PowerSeriesRing(Integers(), 60); Coefficients(R!( (1+x^11)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)) )); // G. C. Greubel, Sep 10 2019 (Sage) def A008772_list(prec):     P. = PowerSeriesRing(ZZ, prec)     return P((1+x^11)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4))).list() A008772_list(60) # G. C. Greubel, Sep 10 2019 (GAP) a:=[2, 3, 5, 6, 9, 11, 15, 18, 23];; for n in [10..60] do a[n]:=2*a[n-1]-a[n-2]+a[n-3]-a[n-4]-a[n-5]+a[n-6]-a[n-7]+2*a[n-8]-a[n-9]; od; Concatenation([1, 1], a); # G. C. Greubel, Sep 10 2019 CROSSREFS Sequence in context: A026810 A001400 A008773 * A008771 A309831 A309830 Adjacent sequences:  A008769 A008770 A008771 * A008773 A008774 A008775 KEYWORD nonn AUTHOR EXTENSIONS More terms added by G. C. Greubel, Sep 10 2019 STATUS approved

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Last modified May 26 22:58 EDT 2020. Contains 334634 sequences. (Running on oeis4.)