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 A125692 Riordan array (1-x*c(-x^2),x(1-x*c(-x^2))) where c(x) is the g.f. of A000108. 2
 1, -1, 1, 0, -2, 1, 1, 1, -3, 1, 0, 2, 3, -4, 1, -2, -2, 2, 6, -5, 1, 0, -4, -6, 0, 10, -6, 1, 5, 5, -3, -11, -5, 15, -7, 1, 0, 10, 15, 4, -15, -14, 21, -8, 1, -14, -14, 6, 26, 19, -15, -28, 28, -9, 1, 0, -28, -42, -16, 30, 42, -7, -48, 36, -10, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 COMMENTS Row sums are aerated signed Catalan numbers with g.f. c(-x^2). Inverse of A105306. First column is A105523. LINKS Table of n, a(n) for n=0..65. EXAMPLE Triangle begins 1, -1, 1, 0, -2, 1, 1, 1, -3, 1, 0, 2, 3, -4, 1, -2, -2, 2, 6, -5, 1, 0, -4, -6, 0, 10, -6, 1 Contribution from Paul Barry, Apr 18 2010: (Start) Production matrix begins -1, 1, -1, -1, 1, -1, -1, -1, 1, -1, -1, -1, -1, 1, -1, -1, -1, -1, -1, 1, -1, -1, -1, -1, -1, -1, 1, -1, -1, -1, -1, -1, -1, -1, 1, -1, -1, -1, -1, -1, -1, -1, -1, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 1 (End) CROSSREFS Sequence in context: A294880 A212219 A073266 * A128258 A104967 A098495 Adjacent sequences: A125689 A125690 A125691 * A125693 A125694 A125695 KEYWORD easy,sign,tabl AUTHOR Paul Barry, Nov 30 2006 STATUS approved

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Last modified June 23 15:55 EDT 2024. Contains 373651 sequences. (Running on oeis4.)