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A279573 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 23
5 102
6 499
7 2625
8 14601
9 84847
10 510614
11 3161964
12 20050770
13 129718404
14 853689031
15 5701759424
16 38574689104
17 263936457042
18 1824032887177
19 12718193293888
20 89386742081688
21 632746535420834
22 4508140253686638
23 32308561883462867
24 232790342330880572

[1,1,2,6,23,102,499,2625,14601,84847,510614,
 3161964,20050770,129718404,853689031,5701759424,
 38574689104,263936457042,1824032887177,
 12718193293888,89386742081688,632746535420834,
 4508140253686638,32308561883462867,
 232790342330880572]

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Last modified April 3 20:29 EDT 2020. Contains 333199 sequences. (Running on oeis4.)