plot -1/4 (1 + n)^(2 - n) (4 + 2^n - 4 HarmonicNumber(n, 2 - n)) for n=3..149plot -1/4 (1 + n)^(2 - n) (4 + 2^n - 4 HarmonicNumber(n, 2 - n)) for n=3..149

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