Problem with old relation

Hi, 

1) When I create new table expample.

CREATE TABLE "kokot" (
"kokot" SERIAL );


2) and then DROP table kokot ..

3) and then again CREATE table 

CREATE TABLE "kokot" (
"kokot" SERIAL );

PostgreSQL return this error 

PostgreSQL said: ERROR: Relation 'kokot_kokot_seq' already exists
Your query:
CREATE TABLE "kokot" (
"kokot" SERIAL );

Where is problem ?
Thanks 

Rado 
-- 
Rado Petrik <r.p@szm.sk>