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A038393 as a simple table

n a(n)
0 1
1 1
2 2
3 6
4 20
5 78
6 342
7 1608
8 7966
9 41054
10 218342
11 1191038
12 6635164
13 37621952
14 216557220
15 1262829914
16 7447921572 

[1,1,2,6,20,78,342,1608,7966,41054,218342,1191038,
 6635164,37621952,216557220,1262829914,7447921572]

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Last modified April 26 01:44 EDT 2024. Contains 371989 sequences. (Running on oeis4.)