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revised How can I find the coefficient of a term in this generating function by using the “old” method?
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comment How do I design a generating function to count subsets of distinct objects?
$(1+x)^{250}$ looks like it does not take into account the limitations of at most 3 per state. Given your other advice, however, I came up with $g(x)=(1+5x+10x^{2}+10x^{3})^{50}$
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revised Help with the algebra in for this number theory proof?
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