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A113844 as a simple table

n a(n)
1 1
2 1
3 1
4 2
5 6
6 18
7 78
8 312
9 2070
10 12420
11 163878
12 1966536
13 62213526
14 1866405780
15 206591803854
16 22311914816232
17 9436063264020024
18 3963146570888410080
19 9887814229774042889370
20 24620657432137366794531300

[1,1,1,2,6,18,78,312,2070,12420,163878,1966536,
 62213526,1866405780,206591803854,22311914816232,
 9436063264020024,3963146570888410080,
 9887814229774042889370,24620657432137366794531300]

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Last modified April 11 18:59 EDT 2021. Contains 342888 sequences. (Running on oeis4.)