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A105618 as a simple table

n a(n)
0 1
1 3
2 15
3 107
4 991
5 11203
6 148879
7 2270027
8 39041151
9 747704963
10 15784630159
11 364256650027
12 9124264794271
13 246600188525123
14 7153677209063439
15 221729176945261067
16 7313478624348963391
17 255786689421734222083

[1,3,15,107,991,11203,148879,2270027,39041151,
 747704963,15784630159,364256650027,9124264794271,
 246600188525123,7153677209063439,
 221729176945261067,7313478624348963391,
 255786689421734222083]

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Last modified January 16 05:22 EST 2022. Contains 350374 sequences. (Running on oeis4.)