[seqfan] Re: When is a sequence a list?

[Frank Adams-watters]

I think people are over-thinking this. We only use the identification 
of certain sequences as lists in order to determine what the offset 
should be. But if a(n) is a list, f(a(n)) will naturally have offset 1, 
which what it has if we call it a list.

Franklin T. Adams-Watters