SQL equivallent to "\ds" in psql

Where does Postgres store information about the sequences?  I tried
looking in the tables produced by "\dS", but could find no references
to the sequences. :(

What I want is an SQL equivallent of "\ds" command, which will return
a list of all sequences in the current database.  I need this for a
periodically run script so that I could keep an eye on all sequences
in the database.

Many thanks,
-- 
Arcady Genkin