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 A170759 G.f.: (1+x)/(1-39*x). 50
 1, 40, 1560, 60840, 2372760, 92537640, 3608967960, 140749750440, 5489240267160, 214080370419240, 8349134446350360, 325616243407664040, 12699033492898897560, 495262306223057004840, 19315229942699223188760, 753293967765269704361640 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..600 FORMULA a(n)= Sum_[k, 0<=k<=n} A097805(n,k)*(-1)^(n-k)*40^k. [From Philippe DELEHAM, Dec 04 2009] a(0) = 1; for n>0, a(n) = 40*39^(n-1). [From Vincenzo Librandi, Dec 05 2009] a(0)=1, a(1)=40, a(n) = 39*a(n-1). - Vincenzo Librandi, Dec 10 2012 MATHEMATICA CoefficientList[Series[(1 + x)/(1 - 39*x), {x, 0, 30}], x] (* Vincenzo Librandi, Dec 10 2012 *) PROG (MAGMA) [1] cat [40*39^(n-1): n in [1..20]]; // Vincenzo Librandi, Dec 11 2012 CROSSREFS Sequence in context: A170673 A170721 A063820 * A218742 A158703 A209223 Adjacent sequences:  A170756 A170757 A170758 * A170760 A170761 A170762 KEYWORD nonn,easy AUTHOR N. J. A. Sloane, Dec 04 2009 STATUS approved

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