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A331637 as a simple table

n a(n)
1 1
2 4
3 14
4 89
5 542
6 5156
7 47294
8 570074
9 7103343
10 104493608
11 1622632574
12 28411638982
13 526858348382
14 10699857854372
15 230297862127828
16 5330284144906443
17 130370767029135902
18 3390229775073259800
19 92801587319328411134
20 2679531116538955252338

[1,4,14,89,542,5156,47294,570074,7103343,
 104493608,1622632574,28411638982,526858348382,
 10699857854372,230297862127828,5330284144906443,
 130370767029135902,3390229775073259800,
 92801587319328411134,2679531116538955252338]

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Last modified May 18 18:42 EDT 2022. Contains 353824 sequences. (Running on oeis4.)