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A033820 formatted as a triangular array:

1
1 3
2 4 10
5 9 15 35
14 24 36 56 126
42 70 100 140 210 462
132 216 300 400 540 792 1716
429 693 945 1225 1575 2079 3003 6435
1430 2288 3080 3920 4900 6160 8008 11440 24310

A033820 formatted as a square array:

1 1 2 5 14 42 132 429 1430
3 4 9 24 70 216 693 2288
10 15 36 100 300 945 3080
35 56 140 400 1225 3920
126 210 540 1575 4900
462 792 2079 6160
1716 3003 8008
6435 11440
24310

A033820 formatted as an upper right triangle:

1 1 2 5 14 42 132 429 1430
3 4 9 24 70 216 693 2288
10 15 36 100 300 945 3080
35 56 140 400 1225 3920
126 210 540 1575 4900
462 792 2079 6160
1716 3003 8008
6435 11440
24310

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.


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