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A143872 as a simple table

n a(n)
0 1
1 2
2 5
3 15
4 62
5 329
6 2307
7 21482
8 264021
9 4334045
10 94435970
11 2750500857
12 106769182533 

[1,2,5,15,62,329,2307,21482,264021,4334045,
 94435970,2750500857,106769182533]

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Last modified July 16 21:48 EDT 2024. Contains 374358 sequences. (Running on oeis4.)