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A352779
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Powers of -3: a(n) = (-3)^n.
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1
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1, -3, 9, -27, 81, -243, 729, -2187, 6561, -19683, 59049, -177147, 531441, -1594323, 4782969, -14348907, 43046721, -129140163, 387420489, -1162261467, 3486784401, -10460353203, 31381059609, -94143178827, 282429536481, -847288609443, 2541865828329, -7625597484987
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OFFSET
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0,2
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LINKS
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FORMULA
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a(0) = 1; a(n) = -3*a(n-1), n >= 1.
G.f.: 1/(1+3*x).
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MATHEMATICA
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LinearRecurrence[{-3}, {1}, 28]
CoefficientList[Series[1/(1+3*x), {x, 0, 27}], x]
Table[(-3)^n, {n, 0, 27}]
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PROG
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CROSSREFS
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KEYWORD
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sign,easy
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AUTHOR
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STATUS
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approved
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