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A007593 as a simple table

n a(n)
1 21
2 2133
3 19521
4 176661
5 129127041
6 328256967373616371221
7 67585198634817522935331173030319681
8 443426488243037769923934299701036035201

[21,2133,19521,176661,129127041,
 328256967373616371221,
 67585198634817522935331173030319681,
 443426488243037769923934299701036035201]

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Last modified June 20 12:05 EDT 2019. Contains 324234 sequences. (Running on oeis4.)