🚀 go-pugleaf

I'm trying to make a divided difference table in LaTeX, but I don't
want to leave a blank line between alternate entries. Is there any 
way? For those who are wondering what on Earth I'm talking about,
a divided difference table is a triangular table looking something
like this:
1
  2
3   4
  5   6
7   8
  9
1

but there should not be blank spaces, the 2 5 9 column should be
without blank space and start only half a line below the 1 3 7 1
column. Is there a way of doing this in LaTeX. And I want a normal
heading, without the entries being dropped half a line... Thanks in advanve,
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