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A165976 as a simple table

n a(n)
0 1
1 3
2 17
3 117
4 887
5 7131
6 59661
7 513897
8 4526603
9 40588263
10 369277481
11 3400840845
12 31644776383
13 297079014771
14 2810553697989
15 26770090211793
16 256510096740243
17 2470981627433919
18 23916768109136289
19 232485664356533877

[1,3,17,117,887,7131,59661,513897,4526603,
 40588263,369277481,3400840845,31644776383,
 297079014771,2810553697989,26770090211793,
 256510096740243,2470981627433919,
 23916768109136289,232485664356533877]

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Last modified April 19 21:57 EDT 2021. Contains 343117 sequences. (Running on oeis4.)