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A171859 as a simple table

n a(n)
0 1
1 0
2 0
3 1
4 6
5 28
6 127
7 598
8 2984
9 15851
10 89532
11 536152
12 3392609
13 22609852
14 158220300
15 1159380201
16 8873605258
17 70778190768
18 587125257319
19 5055713850058
20 45114387675316
21 416535887361323
22 3973511993495144
23 39112086371684844

[1,0,0,1,6,28,127,598,2984,15851,89532,536152,
 3392609,22609852,158220300,1159380201,8873605258,
 70778190768,587125257319,5055713850058,
 45114387675316,416535887361323,3973511993495144,
 39112086371684844]

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Last modified April 24 07:44 EDT 2024. Contains 371922 sequences. (Running on oeis4.)