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A197923 as a simple table

n a(n)
1 1
2 4
3 22
4 177
5 5738
6 160173
7 13351462
8 1939178408
9 480290035535

[1,4,22,177,5738,160173,13351462,1939178408,
 480290035535]

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Last modified May 25 19:19 EDT 2022. Contains 354071 sequences. (Running on oeis4.)