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A155076
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Triangle read by rows. The main diagonal is positive. If rowindex >= 2*columnindex then -1 else 0.
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1
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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; internal format)
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OFFSET
| 1,1
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COMMENTS
| Matrix inverse of this triangle is A155077.
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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,
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CROSSREFS
| Cf. A000123.
Sequence in context: A051731 A135839 A071022 * A176137 A120529 A099443
Adjacent sequences: A155073 A155074 A155075 * A155077 A155078 A155079
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KEYWORD
| sign,tabl
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AUTHOR
| Mats Granvik, Gary W. Adamson (mats.granvik(AT)abo.fi), Jan 19 2009
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