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A068858 as a simple table

n a(n)
1 3
2 15
3 195
4 4095
5 2477475
6 448422975
7 19384876786275
8 70676639845770308825475
9 11604095937711402889585984522057770447375
10 56023729629975618843823135187551800751351023283966800458449243286895375

[3,15,195,4095,2477475,448422975,19384876786275,
 70676639845770308825475,
 11604095937711402889585984522057770447375,
 56023729629975618843823135187551800751351023283966\
 800458449243286895375]

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Last modified November 18 01:41 EST 2019. Contains 329242 sequences. (Running on oeis4.)