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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

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

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: A003417 A158986 A079900 * A117354 A140324 A010250

Adjacent sequences:  A188314 A188315 A188316 * A188318 A188319 A188320

KEYWORD

sign,tabl

AUTHOR

Paul Barry, Mar 28 2011

STATUS

approved

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Last modified July 30 02:02 EDT 2014. Contains 245051 sequences.