Name: Greg Walsh
Who is asking: Student
I can't seem to make any sense of this.
This is a trick example of the type I first learned from John Conway. The process from one line to the next is NOT arithmatic in the usual sense - it is verbal.
Read out the first line, carefully: "one three".
Now read the second line " one one one three"
Write that as the third line: 1113.
Continue like this.