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A195521 as a simple table

n a(n)
1 1
2 1
3 15
4 1695
5 2563933
6 46387885537
7 10665939121760907
8 31749804821289929290261

[1,1,15,1695,2563933,46387885537,
 10665939121760907,31749804821289929290261]

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Last modified April 24 15:57 EDT 2024. Contains 371961 sequences. (Running on oeis4.)