Ah, by sociability I just meant the number of collaborators he worked with. What I'm getting at is that he's abnormal because he published so much, not because

Ah, by sociability I just meant the number of collaborators he worked with. What I'm getting at is that he's abnormal because he published so much, not because he published with so many coauthors. Many mathematicians would have similar looking publication records if they maintained the same level of collaboration and simply published...more. But he was an oddball too, for sure.