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A012293 as a simple table

n a(n)
0 1
1 0
2 1
3 6
4 25
5 140
6 1177
7 10738
8 104977
9 1188120
10 15191889
11 211088350
12 3187087209
13 52357837220
14 926871127977
15 17553084005322
16 354581844112801
17 7614153761167920
18 173108509344647457
19 4153655608324341686

[1,0,1,6,25,140,1177,10738,104977,1188120,
 15191889,211088350,3187087209,52357837220,
 926871127977,17553084005322,354581844112801,
 7614153761167920,173108509344647457,
 4153655608324341686]

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Last modified July 8 17:40 EDT 2020. Contains 335524 sequences. (Running on oeis4.)