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A338436 as a simple table

n a(n)
0 1
1 1
2 2
3 9
4 28
5 245
6 726
7 11480
8 48560
9 735705
10 4352050
11 98329550
12 483122388
13 15543026746
14 105478954140
15 2717386363515
16 25322712724800
17 896697825211141
18 6457456535543802
19 307183340680888754
20 2920059397230745400
21 107461248960479482740
22 1360407935621917573380

[1,1,2,9,28,245,726,11480,48560,735705,4352050,
 98329550,483122388,15543026746,105478954140,
 2717386363515,25322712724800,896697825211141,
 6457456535543802,307183340680888754,
 2920059397230745400,107461248960479482740,
 1360407935621917573380]

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Last modified December 5 13:26 EST 2022. Contains 358586 sequences. (Running on oeis4.)