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a(n) = -1/9 - (2/3)*n + (1/9)*(-2)^n, with n >= 0. - Paolo P. Lava, Aug 04 2008
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Negative values of the Inverse inverse binomial transform of A045883.
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LinearRecurrence[{0, 3, -2}, {0, -1, -1}, 50] (* Paolo Xausa, Nov 14 2023 *)
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<a href="/index/Rec#order_03">Index entries for linear recurrences with constant coefficients</a>, signature (0,3,-2).
easy,sign,changed
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