Re: [math-fun] Factorials in non-hypergeometric sums

Whenever that happened to me, I was just glad that I was on the right track!

I remember the number-theorist Michael Larsen as a teen-ager (back when I was a teen-ager too), sharing with me his excitement over his graduating from rediscovering nineteenth-century theorems to rediscovering twentieth- century theorems. Jim Propp