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A146388 as a simple table

n a(n)
1 1
2 1
3 1
4 1
5 9
6 20
7 73
8 328
9 1655
10 10746
11 103583
12 974458
13 13360226
14 192146495
15 4002035013
16 89158887545
17 2840078369454

[1,1,1,1,9,20,73,328,1655,10746,103583,974458,
 13360226,192146495,4002035013,89158887545,
 2840078369454]

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Last modified November 13 02:59 EST 2019. Contains 329085 sequences. (Running on oeis4.)