> the 1/n scheme indicates the length of the sequence upfront, whereas the backslash scheme doesn't. I've seen a variation of the 1/n scheme that literally use

> the 1/n scheme indicates the length of the sequence upfront, whereas the backslash scheme doesn't. I've seen a variation of the 1/n scheme that literally uses "1/n", "2/n", etc. to avoid specifying the length up front. Usually the end of the sequence isn't indicated in that case.