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 A155076 Triangle read by rows. The main diagonal is positive. If rowindex >= 2*columnindex then -1 else 0. 1
 1, -1, 1, -1, 0, 1, -1, -1, 0, 1, -1, -1, 0, 0, 1, -1, -1, -1, 0, 0, 1, -1, -1, -1, 0, 0, 0, 1, -1, -1, -1, -1, 0, 0, 0, 1, -1, -1, -1, -1, 0, 0, 0, 0, 1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 1, -1, -1, -1, -1, -1, -1, 0, 0, 0, 0, 0, 1, -1, -1, -1, -1, -1, -1, 0 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Matrix inverse of this triangle is A155077. LINKS EXAMPLE Table begins: 1, -1,1, -1,0,1, -1,-1,0,1, -1,-1,0,0,1, -1,-1,-1,0,0,1, -1,-1,-1,0,0,0,1, -1,-1,-1,-1,0,0,0,1, -1,-1,-1,-1,0,0,0,0,1, CROSSREFS Cf. A000123. Sequence in context: A304569 A135839 A071022 * A257196 A176137 A290808 Adjacent sequences:  A155073 A155074 A155075 * A155077 A155078 A155079 KEYWORD sign,tabl AUTHOR Mats Granvik, Gary W. Adamson, Jan 19 2009 STATUS approved

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Last modified April 18 06:48 EDT 2019. Contains 322209 sequences. (Running on oeis4.)