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!)
A122522 a(n) = a(n - 2) + a(n - 8). 4
1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 7, 7, 10, 10, 14, 14, 19, 19, 26, 26, 36, 36, 50, 50, 69, 69, 95, 95, 131, 131, 181, 181, 250, 250, 345, 345, 476, 476, 657, 657, 907, 907, 1252, 1252, 1728, 1728, 2385, 2385, 3292, 3292, 4544, 4544, 6272, 6272, 8657, 8657 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,9

LINKS

Table of n, a(n) for n=1..62.

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

FORMULA

G.f.: x*(1+x)/(1 - x^2 - x^8). - G. C. Greubel, May 01 2017

MATHEMATICA

CoefficientList[Series[x*(1 + x)/(1 - x^2 - x^8), {x, 0, 50}], x] (* G. C. Greubel, May 01 2017 *)

PROG

(PARI) x='x+O('x^50); Vec(x*(1+x)/(1 - x^2 - x^8)) \\ G. C. Greubel, May 01 2017

CROSSREFS

Cf. A003269.

Sequence in context: A185328 A210718 A027191 * A227614 A236473 A029030

Adjacent sequences:  A122519 A122520 A122521 * A122523 A122524 A122525

KEYWORD

nonn,easy,less

AUTHOR

Roger L. Bagula, Sep 16 2006

EXTENSIONS

Edited by N. J. A. Sloane, Sep 17 2006

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 5 23:41 EDT 2021. Contains 343579 sequences. (Running on oeis4.)