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A089179 as a simple table

n a(n)
1 1
2 2
3 6
4 20
5 85
6 402
7 2464
8 15752
9 119655
10 976190
11 9331894
12 91769988
13 1077214879
14 12570658310
15 168390947820
16 2337860163248
17 35513649943201
18 544140329564898
19 9660558198790510
20 166372364728477220

[1,2,6,20,85,402,2464,15752,119655,976190,9331894,
 91769988,1077214879,12570658310,168390947820,
 2337860163248,35513649943201,544140329564898,
 9660558198790510,166372364728477220]

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Last modified April 19 23:40 EDT 2024. Contains 371798 sequences. (Running on oeis4.)