Is template1 intended to have oid 1 ?

Hello hackers,

I've just noticed this in pg_database.dat:

  { oid => '1', oid_symbol => 'TemplateDbOid',
    descr => 'default template for new databases',
    datname => 'template1', ...

but in the most recent cluster that I pg_upgraded, template1 has oid 16400.

Nothing is acting broken, but ... is that supposed to happen?

Regards,
-Chap