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A198004
as a simple table
n
a(n)
1
1
2
4
3
21
4
265
5
5408
6
284316
7
27312550
8
4644354501
9
1817882439930
[1,4,21,265,5408,284316,27312550,4644354501, 1817882439930]
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Last modified March 29 06:15 EDT 2024. Contains 371265 sequences. (Running on oeis4.)