(Aside: `C-u 38 0' doesn't work because Emacs hears `C-u 380' and waits
for a key. `M-: (insert-char ?0 38) RET' does the right thing, but is
ugly. Any better suggestions?)
There's a million ways to skin that cat.
ESC 38 C-q 60 RET
[Octal 060 == '0']
M.