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A137552 as a simple table

n a(n)
0 1
1 1
2 2
3 5
4 14
5 43
6 146
7 550
8 2289
9 10438
10 51691
11 275770
12 1574141
13 9559033
14 61455254
15 416572897 

[1,1,2,5,14,43,146,550,2289,10438,51691,275770,
 1574141,9559033,61455254,416572897]

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Last modified April 19 18:05 EDT 2024. Contains 371798 sequences. (Running on oeis4.)