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A084244
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a(0)=1,a(1)=5,a(n)=-3a(n-1), n>1.
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1
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1, 5, -15, 45, -135, 405, -1215, 3645, -10935, 32805, -98415, 295245, -885735, 2657205, -7971615, 23914845, -71744535, 215233605, -645700815, 1937102445, -5811307335, 17433922005, -52301766015, 156905298045, -470715894135, 1412147682405, -4236443047215
(list; graph; refs; listen; history; internal format)
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