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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 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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