login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A291983 Expansion of 1/((1+x)*(1+x^2)*(1+x^3)). 3
1, -1, 0, -1, 2, -1, 1, -2, 2, -2, 2, -2, 3, -3, 2, -3, 4, -3, 3, -4, 4, -4, 4, -4, 5, -5, 4, -5, 6, -5, 5, -6, 6, -6, 6, -6, 7, -7, 6, -7, 8, -7, 7, -8, 8, -8, 8, -8, 9, -9, 8, -9, 10, -9, 9, -10, 10, -10, 10, -10, 11, -11, 10, -11, 12, -11, 11, -12, 12, -12, 12 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..70.

Index entries for linear recurrences with constant coefficients, signature (-1, -1, -2, -1, -1, -1).

MATHEMATICA

CoefficientList[Series[1/((1+x)(1+x^2)(1+x^3)), {x, 0, 70}], x] (* or *) LinearRecurrence[ {-1, -1, -2, -1, -1, -1}, {1, -1, 0, -1, 2, -1}, 80] (* Harvey P. Dale, Jun 12 2022 *)

PROG

(PARI) Vec(1/((1+x)*(1+x^2)*(1+x^3)) + O(x^100))

CROSSREFS

Cf. A112689, A291954, A291984, A291985.

Sequence in context: A025839 A053261 A123584 * A112689 A298604 A190353

Adjacent sequences: A291980 A291981 A291982 * A291984 A291985 A291986

KEYWORD

sign

AUTHOR

Seiichi Manyama, Sep 07 2017

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 3 19:41 EST 2022. Contains 358543 sequences. (Running on oeis4.)