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A161568 as a simple table

n a(n)
0 1
1 2
2 16
3 206
4 3976
5 101402
6 3237220
7 124293206
8 5582747824
9 287346080690
10 16680250440124
11 1078327289938670
12 76840445565238024
13 5984507179839282122
14 505778795448930860308
15 46104043794638089809158

[1,2,16,206,3976,101402,3237220,124293206,
 5582747824,287346080690,16680250440124,
 1078327289938670,76840445565238024,
 5984507179839282122,505778795448930860308,
 46104043794638089809158]

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Last modified July 5 20:21 EDT 2020. Contains 335473 sequences. (Running on oeis4.)