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A067691 as a simple table

n a(n)
0 0
1 1
2 2
3 9
4 1000
5 1004006004001
6 1020191144865623440455270145683555422808365843606721760320032

[0,1,2,9,1000,1004006004001,
 10201911448656234404552701456835554228083658436067\
 21760320032]

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Last modified August 20 01:14 EDT 2019. Contains 326136 sequences. (Running on oeis4.)