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A146472 as a simple table

n a(n)
1 1
2 1
3 1
4 1
5 3
6 9
7 23
8 85
9 375
10 2149
11 15299
12 129877
13 1353943
14 17475557
15 279267939
16 5511590965
17 133957241929
18 4003924495735
19 147542199515841
20 6704016396279819
21 375798793326385295
22 25965634034447375655

[1,1,1,1,3,9,23,85,375,2149,15299,129877,1353943,
 17475557,279267939,5511590965,133957241929,
 4003924495735,147542199515841,6704016396279819,
 375798793326385295,25965634034447375655]

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Last modified January 19 00:22 EST 2022. Contains 350464 sequences. (Running on oeis4.)