|
| |
|
|
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 sequences related to Bessel functions or polynomials
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
|
| |
|
|
