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A130832 as a simple table

n a(n)
1 20
2 420
3 160420
4 25600160420
5 655360000025600160420
6 429496729600000000000655360000025600160420

[20,420,160420,25600160420,655360000025600160420,
 429496729600000000000655360000025600160420]

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Last modified March 28 04:13 EDT 2024. Contains 371235 sequences. (Running on oeis4.)