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 A055528 a(n)=10*a(n-1)+n^3, a(0)=0. 0
 0, 1, 18, 207, 2134, 21465, 214866, 2149003, 21490542, 214906149, 2149062490, 21490626231, 214906264038, 2149062642577, 21490626428514, 214906264288515, 2149062642889246, 21490626428897373, 214906264288979562, 2149062642889802479, 21490626428898032790 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS a(n)/10^n converges to 470/2187=0.214906264... LINKS Index entries for linear recurrences with constant coefficients, signature (14,-46,64,-41,10). FORMULA a(n) = (10^n-1)*(470/2187)-n^3/9-n^2*(10/27)-n*(110/243). G.f.: -x*(x^2+4*x+1) / ((x-1)^4*(10*x-1)). - Colin Barker, Sep 13 2014 PROG (PARI) concat(0, Vec(-x*(x^2+4*x+1)/((x-1)^4*(10*x-1)) + O(x^100))) \\ Colin Barker, Sep 13 2014 CROSSREFS Cf. A014824. Sequence in context: A028025 A109126 A022742 * A304202 A298988 A025959 Adjacent sequences:  A055525 A055526 A055527 * A055529 A055530 A055531 KEYWORD nonn,easy AUTHOR Henry Bottomley, Jul 04 2000 EXTENSIONS Corrected by T. D. Noe, Nov 08 2006 More terms from Colin Barker, Sep 13 2014 STATUS approved

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Last modified December 12 15:11 EST 2019. Contains 329960 sequences. (Running on oeis4.)