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A327827 as a simple table

n a(n)
0 0
1 1
2 2
3 9
4 40
5 235
6 1476
7 11214
8 91848
9 859527
10 8710300
11 97675138
12 1179954612
13 15490520786
14 217602374458
15 3280028076615
16 52571985879600
17 895913825750191
18 16140560853800556
19 307048409240931810
20 6143666813617775100
21 129096480664676773542
22 2840750997343361802150

[0,1,2,9,40,235,1476,11214,91848,859527,8710300,
 97675138,1179954612,15490520786,217602374458,
 3280028076615,52571985879600,895913825750191,
 16140560853800556,307048409240931810,
 6143666813617775100,129096480664676773542,
 2840750997343361802150]

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Last modified February 27 03:30 EST 2020. Contains 332299 sequences. (Running on oeis4.)