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A143878
as a simple table
n
a(n)
0
1
1
2
2
5
3
17
4
92
5
581
6
4989
7
54250
8
776877
9
14503255
10
356467268
11
11553201879
12
495106836021
[1,2,5,17,92,581,4989,54250,776877,14503255, 356467268,11553201879,495106836021]
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Last modified April 20 00:26 EDT 2024. Contains 371798 sequences. (Running on oeis4.)