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A326984 as a simple table

n a(n)
0 1
1 0
2 1
3 1
4 3
5 13
6 57
7 271
8 1467
9 8905
10 58965
11 420331
12 3212391
13 26227477
14 227640033
15 2090172631
16 20222758995
17 205524856129
18 2188159483341
19 24344716477411
20 282390978550239
21 3408195810080461
22 42719427069801369
23 555174137978970511
24 7469189351830156683

[1,0,1,1,3,13,57,271,1467,8905,58965,420331,
 3212391,26227477,227640033,2090172631,20222758995,
 205524856129,2188159483341,24344716477411,
 282390978550239,3408195810080461,
 42719427069801369,555174137978970511,
 7469189351830156683]

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Last modified September 23 19:41 EDT 2020. Contains 337315 sequences. (Running on oeis4.)