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

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: 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