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A007115
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Expansion of (1-x-x^2)^x.
(Formerly M1917)
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0
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1, 0, -2, -9, -20, -30, 66, 0, -7216, -155736, -2447640, -40095000, -696155448, -13193809200, -269899395024, -5951688692040, -140573490904320, -3543930826470720, -94977073790051904, -2697112556290627200
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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REFERENCES
| N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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MATHEMATICA
| With[{nn=30}, CoefficientList[Series[(1-x-x^2)^x, {x, 0, nn}], x] Range[ 0, nn]!] (* From Harvey P. Dale, Jul 26 2011 *)
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CROSSREFS
| Sequence in context: A077338 A047883 A042915 * A154495 A014107 A173102
Adjacent sequences: A007112 A007113 A007114 * A007116 A007117 A007118
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KEYWORD
| sign
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AUTHOR
| Simon Plouffe (simon.plouffe(AT)gmail.com)
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EXTENSIONS
| Extended with signs 11/98 by Christian G. Bower (bowerc(AT)usa.net).
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