Many thanks to several readers. Here is the reference to Mathematical
Gazette.
Title: “Another surprising appearance of e”
Author: “Nick MacKinnon and 5Ma” (Don’t know what 5Ma stands for.)
Date: June 1990
Volume: 74
No.: 468
Pages: 167-169
One reader is going to fax me the paper. After he has done so, I’ll post a
summary on my FAQ page