[seqfan] submitting sequences with sets as terms

[Bob Selcoe]

Hi Seqfans,

I was hoping for some clarification about submitting sequences with sets as 
terms.

For instance, the sequence of prime factors of A098550(n) n>1 is  {2}, {3} 
{2}, {3}, {2}, {3,5}, {2,7}, {5}, {2,3}...

Is there a preferred format for such sequences?

Thanks in advance,
Bob Selcoe
PS - is there a page on the site which addresses this? I couldn't find it 
from the OEIS Wiki page.