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EXAMPLE
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Using these numbers we can write:
1, 15, 53, 115, 201, 311, 445, 603, 785, 991, 1221, ...
0, 0, 1, 15, 53, 115, 201, 311, 445, 603, 785, ...
0, 0, 0, 0, 1, 15, 53, 115, 201, 311, 445, ...
0, 0, 0, 0, 0, 0, 1, 15, 53, 115, 201, ...
0, 0, 0, 0, 0, 0, 0, 0, 1, 15, 53, ...
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, ...
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The sums of the columns give the sequence A172073 (after 0):
1, 15, 54, 130, 255, 441, 700, 1044, 1485, 2035, 2706, ...
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