Hey, did you want to verify something real quick? I've explained here in more detail >>6351 but the gist of it is that you said the value of a[t] at -f and e in the first row have the same factor, but in the negative space, it isn't the first row, it's n=0. That makes some of the other things you said inaccurate/inconsistent. I can't tell if it's because you worded it weirdly or if I just personally didn't understand,
This is what happens when one us of doesn't pay attention for a while I guess. I swear someone was using 7-unit cells with t at the end somewhere.