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A166993 as a simple table

n a(n)
0 1
1 1
2 5
3 32
4 266
5 2499
6 25765
7 283084
8 3264502
9 39077898
10 481942608
11 6089941550
12 78523226064
13 1029859481949
14 13704960309415
15 184688556173542
16 2516342539576510
17 34617557176739174
18 480336524752492608

[1,1,5,32,266,2499,25765,283084,3264502,39077898,
 481942608,6089941550,78523226064,1029859481949,
 13704960309415,184688556173542,2516342539576510,
 34617557176739174,480336524752492608]

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Last modified October 16 03:52 EDT 2021. Contains 348035 sequences. (Running on oeis4.)