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!)
A188317 Riordan array, inverse of (1/(1-x^2), x/((1-x)*(1-x^2))). 1
1, 0, 1, -1, -1, 1, 2, -1, -2, 1, -1, 6, 0, -3, 1, -6, -10, 10, 2, -4, 1, 20, -4, -26, 13, 5, -5, 1, -22, 63, 14, -49, 14, 9, -6, 1, -49, -148, 112, 58, -78, 12, 14, -7, 1, 260, 45, -396, 144, 138, -111, 6, 20, -8, 1, -441, 755, 435, -789, 123, 263, -145, -5, 27, -9, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
0,7
COMMENTS
Inverse of number triangle A188316.
LINKS
EXAMPLE
Triangle begins
1,
0, 1,
-1, -1, 1,
2, -1, -2, 1,
-1, 6, 0, -3, 1,
-6, -10, 10, 2, -4, 1,
20, -4, -26, 13, 5, -5, 1,
-22, 63, 14, -49, 14, 9, -6, 1,
-49, -148, 112, 58, -78, 12, 14, -7, 1,
260, 45, -396, 144, 138, -111, 6, 20, -8, 1
Production matrix begins
0, 1,
-1, -1, 1,
1, -1, -1, 1,
0, 1, -1, -1, 1,
0, 0, 1, -1, -1, 1,
0, 0, 0, 1, -1, -1, 1,
0, 0, 0, 0, 1, -1, -1, 1,
0, 0, 0, 0, 0, 1, -1, -1, 1,
0, 0, 0, 0, 0, 0, 1, -1, -1, 1
CROSSREFS
Sequence in context: A358549 A158986 A079900 * A117354 A140324 A323284
KEYWORD
sign,tabl
AUTHOR
Paul Barry, Mar 28 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 22 06:21 EST 2024. Contains 370240 sequences. (Running on oeis4.)