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A099174 formatted as a triangular array:

1
0 1
1 0 1
0 3 0 1
3 0 6 0 1
0 15 0 10 0 1
15 0 45 0 15 0 1
0 105 0 105 0 21 0 1
105 0 420 0 210 0 28 0 1
0 945 0 1260 0 378 0 36 0 1
945 0 4725 0 3150 0 630 0 45 0 1

A099174 formatted as a square array:

1 0 1 0 3 0 15 0 105 0 945
1 0 3 0 15 0 105 0 945 0
1 0 6 0 45 0 420 0 4725
1 0 10 0 105 0 1260 0
1 0 15 0 210 0 3150
1 0 21 0 378 0
1 0 28 0 630
1 0 36 0
1 0 45
1 0
1

A099174 formatted as an upper right triangle:

1 0 1 0 3 0 15 0 105 0 945
1 0 3 0 15 0 105 0 945 0
1 0 6 0 45 0 420 0 4725
1 0 10 0 105 0 1260 0
1 0 15 0 210 0 3150
1 0 21 0 378 0
1 0 28 0 630
1 0 36 0
1 0 45
1 0
1

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Last modified December 4 23:11 EST 2009. Contains 170347 sequences.


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