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 A065949 Bessel polynomial {y_n}'''(0). 1
 0, 0, 0, 90, 630, 2520, 7560, 18900, 41580, 83160, 154440, 270270, 450450, 720720, 1113840, 1670760, 2441880, 3488400, 4883760, 6715170, 9085230, 12113640, 15939000, 20720700, 26640900, 33906600, 42751800, 53439750, 66265290, 81557280, 99681120, 121041360, 146084400 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 REFERENCES J. Riordan, Combinatorial Identities, Wiley, 1968, p. 77. LINKS G. C. Greubel, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (7,-21,35,-35,21,-7,1). FORMULA a(n) = 90 * C(n-3, 6) = 90 * A000579(n-3). - Ralf Stephan, Sep 03 2003 From Colin Barker, Aug 01 2013: (Start) a(n) = ((-2+n)*(-1+n)*n*(1+n)*(2+n)*(3+n))/8. G.f.: -90*x^3 / (x-1)^7. (End) E.g.f.: (1/8)*x^3*(120 + 90*x + 18*x^2 + x^3)*exp(x). - G. C. Greubel, Aug 15 2017 MATHEMATICA Drop[90*Binomial[Range[40]-3, 6], 5] (* Harvey P. Dale, Sep 20 2013 *) PROG (PARI) for(n=0, 50, print1(90*binomial(n+3, 6), ", ")) \\ G. C. Greubel, Aug 15 2017 CROSSREFS Cf. A001518, A001516. Sequence in context: A203787 A203780 A295982 * A224541 A051695 A304165 Adjacent sequences:  A065946 A065947 A065948 * A065950 A065951 A065952 KEYWORD nonn,easy AUTHOR N. J. A. Sloane, Dec 08 2001 EXTENSIONS More terms from Colin Barker, Aug 01 2013 STATUS approved

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Last modified August 9 12:53 EDT 2022. Contains 356026 sequences. (Running on oeis4.)