login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A190913 Sequence A190914 evaluated at the negative index -n. 2
5, 0, 2, 9, 2, 10, 29, 14, 50, 99, 82, 220, 365, 416, 926, 1429, 1954, 3842, 5825, 8778, 15922, 24299, 38414, 66240, 102533, 165560, 276954, 434745, 707394, 1163074, 1846069, 3008302, 4900546, 7839115, 12762378, 20694684, 33271421, 54081272, 87516358, 141133157, 229065490, 370410810, 598383689, 970090922, 1568482962 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (0,1,3,0,-1)

FORMULA

From R. J. Mathar, Jun 05 2011: (Start)

a(n) = A190914(-n).

G.f.: ( 5-3*x^2-6*x^3 ) / ( (x^2+x-1)*(x^3-x^2-x-1) ). (End)

a(n) = A000032(n) + A073145(n). - R. J. Mathar, Jun 05 2011

MATHEMATICA

LinearRecurrence[{0, 1, 3, 0, -1}, {5, 0, 2, 9, 2}, 50] (* Vincenzo Librandi, Feb 15 2012 *)

PROG

(PARI) Vec((5-3*x^2-6*x^3)/((x^2+x-1)*(x^3-x^2-x-1))+O(x^99)) \\ Charles R Greathouse IV, Jun 08 2011

CROSSREFS

Cf. A190914, A000045, A000073, A001608, A000040, A005117, A125666.

Sequence in context: A198883 A261850 A077496 * A019106 A051566 A051567

Adjacent sequences:  A190910 A190911 A190912 * A190914 A190915 A190916

KEYWORD

nonn,easy

AUTHOR

Reikku Kulon, May 23 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 28 04:36 EDT 2020. Contains 334671 sequences. (Running on oeis4.)