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A153869 formatted as a triangular array:

1
1 0
1 2 0
0 2 3 0
0 0 3 4 0
0 0 0 4 5 0
0 0 0 0 5 6 0
0 0 0 0 0 6 7 0
0 0 0 0 0 0 7 8 0
0 0 0 0 0 0 0 8 9 0

A153869 formatted as a square array:

1 1 1 0 0 0 0 0 0 0
0 2 2 0 0 0 0 0 0
0 3 3 0 0 0 0 0
0 4 4 0 0 0 0
0 5 5 0 0 0
0 6 6 0 0
0 7 7 0
0 8 8
0 9
0

A153869 formatted as an upper right triangle:

1 1 1 0 0 0 0 0 0 0
0 2 2 0 0 0 0 0 0
0 3 3 0 0 0 0 0
0 4 4 0 0 0 0
0 5 5 0 0 0
0 6 6 0 0
0 7 7 0
0 8 8
0 9
0

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.


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