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A107589 as a simple table

n a(n)
0 1
1 1
2 2
3 5
4 15
5 52
6 205
7 921
8 4807
9 30288
10 243338
11 2636799
12 39930125
13 851799936
14 25433798924
15 1055317281976
16 60604557533320
17 4808635126697325
18 526853206940116357
19 79701484897115170371
20 16651360300285759198344

[1,1,2,5,15,52,205,921,4807,30288,243338,2636799,
 39930125,851799936,25433798924,1055317281976,
 60604557533320,4808635126697325,
 526853206940116357,79701484897115170371,
 16651360300285759198344]

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Last modified May 9 19:07 EDT 2021. Contains 343746 sequences. (Running on oeis4.)