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Search: id:A078050
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| A078050 |
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Expansion of (1-x)/(1+x+2*x^2). |
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+0
4
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| 1, -2, 0, 4, -4, -4, 12, -4, -20, 28, 12, -68, 44, 92, -180, -4, 364, -356, -372, 1084, -340, -1828, 2508, 1148, -6164, 3868, 8460, -16196, -724, 33116, -31668, -34564, 97900, -28772, -167028, 224572, 109484, -558628, 339660, 777596, -1456916, -98276, 3012108, -2815556, -3208660, 8839772
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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INVERTi transform of A005408, (2n + 1) = A078050 signed: (1, 2, 0, -4, -4, 4, 12, 4, -20, -28,...) = left border of triangle A144106. [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Sep 11 2008]
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CROSSREFS
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A005408, A144106 [From Gary W. Adamson (qntmpkt(AT)yahoo.com), Sep 11 2008]
Sequence in context: A004174 A049797 A116578 this_sequence A134271 A094403 A166085
Adjacent sequences: A078047 A078048 A078049 this_sequence A078051 A078052 A078053
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KEYWORD
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sign
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Nov 17 2002
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