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A304398 as a simple table

n a(n)
0 1
1 8
2 199
3 19568
4 4309702
5 1628514128
6 927231430126
7 737350581437744
8 778840734924755140
9 1054020790695331268000
10 1778132840285207445942196
11 3659007006256230147804241040
12 9023119928096184018484024831288
13 26274442260784898029809836586675872
14 89218495222818281880277619804533375624
15 349496587851612327547463367678217875791792

[1,8,199,19568,4309702,1628514128,927231430126,
 737350581437744,778840734924755140,
 1054020790695331268000,1778132840285207445942196,
 3659007006256230147804241040,
 9023119928096184018484024831288,
 26274442260784898029809836586675872,
 89218495222818281880277619804533375624,
 349496587851612327547463367678217875791792]

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Last modified December 3 00:59 EST 2021. Contains 349445 sequences. (Running on oeis4.)