Hi,
 
I would like to generate below triangular matrix for some  a.
 
0
0
0
0
0
0
1
0
0
0
0
0
a
1
0
0
0
0
a^2
a
1
0
0
0
a^3
a^2
a
1
0
0
a^4
a^3
a^2
a
1
0
 
What's an efficient way to do this? (this matrix being KxK, K very
large)
 
Thanks
 
Zava
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