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A068666 as a simple table

n a(n)
1 5
2 55
3 5005
4 55055
5 50155105
6 5065665605
7 50155155155105
8 5464353998993534645
9 541025148469303964841520145
10 513016415223221833242338122322514610315

[5,55,5005,55055,50155105,5065665605,
 50155155155105,5464353998993534645,
 541025148469303964841520145,
 513016415223221833242338122322514610315]

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Last modified July 2 16:19 EDT 2020. Contains 335404 sequences. (Running on oeis4.)