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A058790 as a simple table

n a(n)
1 1
2 3
3 12
4 66
5 445
6 4279
7 53340
8 846254
9 16333946
10 371976963
11 9763321109
12 290473143807
13 9674133467729
14 357177322891321
15 14503958827502886
16 643502334799711633
17 31018731336031551119
18 1616523352051185316626
19 90689288905913623412837
20 5456178840303106057314759
21 350830170593891706361540379

[1,3,12,66,445,4279,53340,846254,16333946,
 371976963,9763321109,290473143807,9674133467729,
 357177322891321,14503958827502886,
 643502334799711633,31018731336031551119,
 1616523352051185316626,90689288905913623412837,
 5456178840303106057314759,
 350830170593891706361540379]

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Last modified January 29 16:58 EST 2020. Contains 331347 sequences. (Running on oeis4.)