Campaigns

We are looking to set up a series of emails that will be triggered to new members of our association at the following intervals: 

• 1 week after joining
• 3 weeks after joining
• 5 weeks after joining
• 7 weeks after joining
• 11 weeks after joining
• 13 weeks after joining
• 15 weeks after joining
• 24 weeks after joining 

Is there a way to do this since the intervals between emails are not the same? It seems that engagement programs require the interval between sends to be the same (i.e. weekly or biweekly, etc.)