OPPI - Sorry, yes I do agree 
But If you want to suck every last ounce of brightness from the LED, you could go as low as just one 330 Ohm resistor,I do it a lot. I wouldn't do it if it were NOT a blinker. Since it is a blinker, the blinking keeps the constant load off of the LED. But Fetthunter's suggestion is the way to go for most applications.
Chris