I am wondering if it is possible to produce an input such as
for an arbitrary but fixed amount of
n without having to type in every single term by hand. Note that the above is not supposed to be a list, but simply a sequence of variables and commas.
I thought that maybe a conversion of
could do the trick. Something similar was asked in the question How to replace plus sign by comma but it does not provide the solution I am after, since it produces a list instead of sequence. Is there a convenient way to get such an input sequence in Mathematica? Thanks for any suggestion!