how to call a procedure if table exists?

IF exists (select * from  OPENDATASOURCE( 'SQLNCLI', 'Data Source= User ID=; Password=').DBName.dbo.TableName
 where id = object_id(N'[dbo].[TableName ]') and OBJECTPROPERTY(id, N'IsTable') = 1)
        Execute('select date from a.table1
                call table
                call proc with date parameter+1;')
ELSE
BEGIN
   call table;
   call proc with date parameter;
END