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Setting a default for nextval sequence

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I'm attempting to set the default value for a serial column.  I created a generic function that I am passing a table name as the only parameter.  I had it working correctly, however, it does not seem to like the sequence name being the same name for each audit table that is created through the function.
So I changed the code to include the table name as part of the naming convention.  Now, I need help on how to alter the serial column the new value  

EXECUTE 'CREATE SEQUENCE '|| t_name ||'tab_id_seq'|| ' OWNED BY '|| t_name || '_cdc'||'.table_id'; 
           
    EXECUTE 'ALTER TABLE ' || quote_ident(t_name || '_cdc') || ' ALTER COLUMN table_id SET DEFAULT nextval(''tab_id_seq'');';

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