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A032220 as a simple table

n a(n)
0 1
1 1
2 0
3 1
4 4
5 1
6 6
7 1
8 64
9 505
10 130
11 1321
12 1024
13 13157
14 2380
15 395851
16 17313664
17 1639617
18 73554666
19 16100905
20 919339264
21 292018525
22 18910614580
23 1549052715
24 1523900106304
25 141366386526801
26 9494469178116

[1,1,0,1,4,1,6,1,64,505,130,1321,1024,13157,2380,
 395851,17313664,1639617,73554666,16100905,
 919339264,292018525,18910614580,1549052715,
 1523900106304,141366386526801,9494469178116]

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Last modified January 30 17:02 EST 2023. Contains 359945 sequences. (Running on oeis4.)