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!)
A117568 Riordan array ((1-x^3)/(1+x^2),x). 2

%I #2 Mar 30 2012 18:59:14

%S 1,0,1,-1,0,1,-1,-1,0,1,1,-1,-1,0,1,1,1,-1,-1,0,1,-1,1,1,-1,-1,0,1,-1,

%T -1,1,1,-1,-1,0,1,1,-1,-1,1,1,-1,-1,0,1,1,1,-1,-1,1,1,-1,-1,0,1,-1,1,

%U 1,-1,-1,1,1,-1,-1,0,1,-1,-1,1,1,-1,-1,1,1,-1,-1,0,1,1,-1,-1,1,1,-1,-1,1,1,-1,-1,0,1

%N Riordan array ((1-x^3)/(1+x^2),x).

%C Inverse of number triangle A117567. Row sums are A117569. Diagonal sums are A102560.

%e Triangle begins

%e 1,

%e 0, 1,

%e -1, 0, 1,

%e -1, -1, 0, 1,

%e 1, -1, -1, 0, 1,

%e 1, 1, -1, -1, 0, 1,

%e -1, 1, 1, -1, -1, 0, 1,

%e -1, -1, 1, 1, -1, -1, 0, 1,

%e 1, -1, -1, 1, 1, -1, -1, 0, 1

%K easy,sign,tabl

%O 0,1

%A _Paul Barry_, Mar 29 2006

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 April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)