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A284718 as a simple table

n a(n)
0 1
1 1
2 1
3 3
4 13
5 69
6 396
7 2355
8 14363
9 89706
10 573828
11 3758866
12 25195016
13 172591294
14 1206482317
15 8592827996
16 62257890162
17 458214977642
18 3421294482237
19 25884913987768
20 198236423171483
21 1535315006313002
22 12015208271571543
23 94943908405295171
24 757044806198966152

[1,1,1,3,13,69,396,2355,14363,89706,573828,
 3758866,25195016,172591294,1206482317,8592827996,
 62257890162,458214977642,3421294482237,
 25884913987768,198236423171483,1535315006313002,
 12015208271571543,94943908405295171,
 757044806198966152]

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Last modified June 20 09:27 EDT 2019. Contains 324234 sequences. (Running on oeis4.)