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A067578 as a simple table

n a(n)
1 1
2 2
3 5
4 12
5 52
6 120
7 752
8 3200
9 19968
10 84480
11 863232
12 3637248
13 44384256
14 275152896
15 2254307328
16 18459131904
17 298743496704
18 1846819160064
19 33568893960192
20 274421835104256
21 3340027488632832
22 33963860494909440
23 752840786973818880
24 6146715129678397440
25 123926213264670720000

[1,2,5,12,52,120,752,3200,19968,84480,863232,
 3637248,44384256,275152896,2254307328,18459131904,
 298743496704,1846819160064,33568893960192,
 274421835104256,3340027488632832,
 33963860494909440,752840786973818880,
 6146715129678397440,123926213264670720000]

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Last modified April 16 09:33 EDT 2021. Contains 343030 sequences. (Running on oeis4.)