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  "body": "\n## Summary\n\nAn exponential generating function encodes a sequence $(a_n)$ as the series $\\sum a_n x^n / n!$. It is the natural tool to count labelled structures, because products give binomial convolutions. The node [[exponential generating function|0KE6NBTVY8]] gives the precise definition.\n",
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  "name": "Exponential generating function",
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        "what": "an inventory row",
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