The Sins of the Fathers New Amsterdam Mondays on Fox, 9 PM “Legacy” Written by Barry Pullman Directed by John David Coles I wonder how many times John Amsterdam has lost track of his children, or rediscovered them. In last week’s episode, he confessed to having fathered at least 63 children over his 400 years. Even my shaky math skills can tell me that’s enough, over time, to populate all of Manhattan. No wonder he calls himself Amsterdam–he is the city. I do fervently hope that if he finds his true love in New York, that she turns out to…