[seqfan] Re: A tricky sequence [A307720]

[Hans Havermann]

Note also that prime 59 appears to be missing from the list of first products that are not yet present at 100000 terms.

> On Apr 24, 2019, at 9:11 AM, Allan Wechsler <acwacw at gmail.com> wrote:
> 
> In A307720, do you need to specify that A(1) is 1? You could say, instead,
> "lexicographically earliest sequence of positive integers" ... and then,
> A(1) = 1 would follow from the conditions.
> 
> It also might be more perspicuous to say "... in which, for all positive k,
> there are exactly k contiguous pairs whose product is k." The reference to
> "a(n)" is confusing because you never actually use n.