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A077917
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Expansion of (1-x)^(-1)/(1+2*x-2*x^2).
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5
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1, -1, 5, -11, 33, -87, 241, -655, 1793, -4895, 13377, -36543, 99841, -272767, 745217, -2035967, 5562369, -15196671, 41518081, -113429503, 309895169, -846649343, 2313089025, -6319476735, 17265131521, -47169216511, 128868696065, -352075825151, 961889042433, -2627929735167
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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REFERENCES
| P. Chinn, R. Grimaldi and S. Heubach, Tiling with Ls and Squares, Journal of Integer Sequences, 10 (2007), Article 07.2.8.
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (-1,4,-2)
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FORMULA
| a(n+1)-a(n) = (-1)^(n+1)*A002605(n+2). - R. J. Mathar, Mar 14 2011
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CROSSREFS
| Sequence in context: A106908 A107442 A127864 * A055936 A194589 A189918
Adjacent sequences: A077914 A077915 A077916 * A077918 A077919 A077920
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KEYWORD
| sign
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Nov 17 2002
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