Samuel Hansen caught up with professor Richard Stanley at the Joint Mathematics Meetings in San Francisco, where they talked about the colloquium lectures he was to give, over 100 different definitions of the Catalan Numbers, and just what the path is from wanting to be a ventriloquist to becoming a mathematician. You can find Professors Stanly’s foundational book on Enumerative Combinatorics here and find out more about him at his website.

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