A188317 - OEIS

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

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 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A188317

Riordan array, inverse of (1/(1-x^2), x/((1-x)*(1-x^2))).

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

Table of n, a(n) for n=0..65.

EXAMPLE

Triangle begins

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

Adjacent sequences: A188314 A188315 A188316 * A188318 A188319 A188320

KEYWORD

sign,tabl

AUTHOR

Paul Barry, Mar 28 2011

STATUS

approved