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A121687 formatted as a simple table:

n a(n)
0 1
1 1
2 3
3 14
4 83
5 574
6 4432
7 37244
8 335153
9 3194510
10 32001596
11 335019839
12 3649450270
13 41227610316
14 481724831132
15 5809341783543
16 72177761136925
17 922539273876404
18 12115001489115910
19 163284755614174305

[1,1,3,14,83,574,4432,37244,335153,3194510,
 32001596,335019839,3649450270,41227610316,
 481724831132,5809341783543,72177761136925,
 922539273876404,12115001489115910,
 163284755614174305]

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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.


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