Hi, I have coined a formula to work out maximum inbound links possible from linking all your sites together without reciprocal and wondered what you thought... The formula is I = (x-1(x))/2 where x=number of sites. I.e. if you have 4 sites, the total maximum inbound links from these to each other is 6. This allows you to make sure you have the maximum amount of links in your wheel. It is more useful when you have a larger number of sites. ??
No offense, this is is gibberish, and interlinking your sites is spammy and not safe. Get enough sites interlinked and Google will consider you a domain farm and drop you from the index.