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A140453 as a simple table

n a(n)
1 1
2 1
3 2
4 3
5 10
6 28
7 164
8 905
9 9826
10 103126
11 2031252
12 43437282
13 1622278624
14 66141208960
15 4579408029576
16 385335180349569
17 51207103076632066
18 8212830157184175946
19 2052124795850957537060
20 683805150345009276656138

[1,1,2,3,10,28,164,905,9826,103126,2031252,
 43437282,1622278624,66141208960,4579408029576,
 385335180349569,51207103076632066,
 8212830157184175946,2052124795850957537060,
 683805150345009276656138]

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Last modified July 29 12:15 EDT 2024. Contains 374734 sequences. (Running on oeis4.)