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A172387 as a simple table

n a(n)
0 1
1 1
2 2
3 7
4 33
5 187
6 1208
7 8626
8 66782
9 553355
10 4862938
11 45025668
12 437029462
13 4429568600
14 46738108168
15 512097036882
16 5814415004953
17 68293044651990
18 828547526906649
19 10369747261970151
20 133732024450930096

[1,1,2,7,33,187,1208,8626,66782,553355,4862938,
 45025668,437029462,4429568600,46738108168,
 512097036882,5814415004953,68293044651990,
 828547526906649,10369747261970151,
 133732024450930096]

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Last modified April 25 15:00 EDT 2024. Contains 371989 sequences. (Running on oeis4.)