#1765 · Algebra · Sequences & series

Complex recurring series

Find the $n^{e x t t h}$ term and the sum to $n$ terms of the series $1 + 2x + 6x^2 + 20x^3 + 66x^4 + 212x^5 +
otdots$.

~20 minAnswer checked instantlyrecurring seriesscale of relation

H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. XXIV. Recurring Series, Examples XXIV, No. 9

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Checked against the answer in H. S. Hall & S. R. Knight, Higher Algebra (1891).