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A124421 as a simple table

n a(n)
0 1
1 0
2 1
3 1
4 5
5 9
6 52
7 130
8 855
9 2707
10 19921
11 75771
12 614866
13 2717570
14 24040451
15 120652827
16 1152972925
17 6460552857
18 66200911138
19 408845736040
20 4465023867757
21 30083964854141
22 348383154017581
23 2539795748336375
24 31052765897026352
25 243282175672281360

[1,0,1,1,5,9,52,130,855,2707,19921,75771,614866,
 2717570,24040451,120652827,1152972925,6460552857,
 66200911138,408845736040,4465023867757,
 30083964854141,348383154017581,2539795748336375,
 31052765897026352,243282175672281360]

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Last modified April 19 16:52 EDT 2024. Contains 371794 sequences. (Running on oeis4.)