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# Coefficient recursion

I was working on defining the coefficients of any $$x^{k}$$, for $$k\leq n$$ from the expansion of $$(x+1)(x+2)\cdots (x+n)$$. I created a table of the coefficients for the first few $$n$$ values, where from I intended to define recursion, then a general formula. As it can be seen, there is $$n$$ in the recursion, so I can't define a general member with characteristic equation.

My question is: How could I step forward? How do I define general member? And is any mistake in what I done?

$\large K_m^{m-1} = K_{m-1}^{m-1} + m \cdot K_{m-1}^{m-2}$

Note by Imi Mali
8 months ago

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