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COMMENTS
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The sequence in the first row and successive differences in followup rows defines the array
1, 1, 1, -3, -7, -19, -39, -83, -167, -339,..
0, 0, -4, -4, -12, -20, -44, -84, -172, -340,..
0, -4, 0, -8, -8, -24, -40, -88, -168, -344,..
-4, 4, -8, 0, -16, -16, -48, -80, -176, -336,..
8, -12, 8, -16, 0, -32, -32, -96, -160, -352, ..
The first two subdiagonals show essentially the powers of 2.
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