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A309188 as a simple table

n a(n)
1 1
2 8
3 109
4 1640
5 27151
6 478232
7 8782075
8 166237160
9 3220837534
10 63562714008
11 1273237637706
12 25820645555000
13 529080420540114
14 10937268134114568
15 227824992158991334
16 4777204094770874856
17 100757627271124231383
18 2136117417345649876112
19 45496022230420668679932

[1,8,109,1640,27151,478232,8782075,166237160,
 3220837534,63562714008,1273237637706,
 25820645555000,529080420540114,10937268134114568,
 227824992158991334,4777204094770874856,
 100757627271124231383,2136117417345649876112,
 45496022230420668679932]

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Last modified September 18 11:20 EDT 2021. Contains 347518 sequences. (Running on oeis4.)