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A111411 as a simple table

n a(n)
0 0
1 1
2 1
3 4
4 8
5 41
6 120
7 826
8 4602
9 47570
10 473649
11 10093040
12 203861263
13 8821354950
14 467680021214
15 51343335981422
16 7427745026671872
17 2637938775610253117
18 1315874983271581469522
19 1773440184382265096424766
20 4023316751814245493054773044
21 26037772294065481552999203782248

[0,1,1,4,8,41,120,826,4602,47570,473649,10093040,
 203861263,8821354950,467680021214,51343335981422,
 7427745026671872,2637938775610253117,
 1315874983271581469522,1773440184382265096424766,
 4023316751814245493054773044,
 26037772294065481552999203782248]

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Last modified December 3 02:14 EST 2021. Contains 349445 sequences. (Running on oeis4.)