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A342907 as a simple table

n a(n)
1 1
2 4
3 20
4 304
5 6784
6 407684
7 39072966
8 9449433606
9 3830070645700
10 3762885306351756
11 6402694828334379856
12 25695884677997378383120 

[1,4,20,304,6784,407684,39072966,9449433606,
 3830070645700,3762885306351756,
 6402694828334379856,25695884677997378383120]

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Last modified May 1 13:51 EDT 2024. Contains 372174 sequences. (Running on oeis4.)