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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A127711 Inverse of the triangle A(n,k) = 1/F(n+1) if k <= n <= 2k, 0 otherwise. 2
1, 0, 1, 0, -1, 2, 0, 1, -2, 3, 0, 0, 0, -3, 5, 0, -1, 2, 0, -5, 8, 0, 0, 0, 0, 0, -8, 13, 0, 1, -2, 3, 0, 0, -13, 21, 0, 0, 0, 0, 0, 0, 0, -21, 34, 0, 0, 0, -3, 5, 0, 0, 0, -34, 55, 0, 0, 0, 0, 0, 0, 0, 0, 0, -55, 89, 0, -1, 2, 0, -5, 8, 0, 0, 0, 0, -89, 144 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

0,6

COMMENTS

It is conjectured that all elements of this triangle are integers. Row sums are A127712.

LINKS

Table of n, a(n) for n=0..77.

EXAMPLE

Triangle begins

1;

0, 1;

0, -1, 2;

0, 1, -2, 3;

0, 0, 0, -3, 5;

0, -1, 2, 0, -5, 8;

0, 0, 0, 0, 0, -8, 13;

0, 1, -2, 3, 0, 0, -13, 21;

0, 0, 0, 0, 0, 0, 0, -21, 34;

0, 0, 0, -3, 5, 0, 0, 0, -34, 55;

0, 0, 0, 0, 0, 0, 0, 0, 0, -55, 89;

0, -1, 2, 0, -5, 8, 0, 0, 0, 0, -89, 144;

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -144, 233;

Triangle is the inverse of the triangle

1;

0, 1;

0, 1/2, 1/2;

0, 0, 1/3, 1/3;

0, 0, 1/5, 1/5, 1/5;

0, 0, 0, 1/8, 1/8, 1/8;

0, 0, 0, 1/13, 1/13, 1/13, 1/13;

0, 0, 0, 0, 1/21, 1/21, 1/21, 1/21;

0, 0, 0, 0, 1/34, 1/34, 1/34, 1/34, 1/34;

CROSSREFS

Sequence in context: A327853 A080099 A268040 * A336937 A069584 A199238

Adjacent sequences: A127708 A127709 A127710 * A127712 A127713 A127714

KEYWORD

sign,tabl

AUTHOR

Paul Barry, Jan 24 2007

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 March 22 09:08 EDT 2023. Contains 361423 sequences. (Running on oeis4.)