Put a white towel or actually I use any color underneath the ink. Use Rubbing alcohol on a pad or a washcloth of light color and make sure it's saturated. Blot and blot until the ink starts lightening up. You can then use a pre-treat on it ...then let it sit for at least 2 mins. Wash according to instructions. You may even work in the detergent into the spot along with the pre-treat before washing. I might even want to let it soak...wash and then check. You may have to repeat
I have had luck with oxy clean hopefully it will work for you. I know someone who used it to remove ink off of clothing after a pen exploded in the wash and it worked.