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A289208 as a simple table

n a(n)
0 0
1 1
2 6
3 40
4 268
5 1801
6 12120
7 81628
8 550040
9 3707635
10 24997966
11 168573824
12 1136933488
13 7668785996
14 51731557296
15 348991600660
16 2354505179952
17 15885669341751
18 107183855819490
19 723217053276952
20 4880016412621148
21 32929530655094281

[0,1,6,40,268,1801,12120,81628,550040,3707635,
 24997966,168573824,1136933488,7668785996,
 51731557296,348991600660,2354505179952,
 15885669341751,107183855819490,723217053276952,
 4880016412621148,32929530655094281]

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Last modified October 18 07:19 EDT 2019. Contains 328146 sequences. (Running on oeis4.)