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A193131 as a simple table

na(n)
13
2384
3419904
41610612736
515000000000000
6277326388342554624
78964455938423371595776
8464227514732017603087171584
936132988816414656965872925540352
104026531840000000000000000000000000000
11618293049656826371620197206797522978209792

[3,384,419904,1610612736,15000000000000,
 277326388342554624,8964455938423371595776,
 464227514732017603087171584,
 36132988816414656965872925540352,
 4026531840000000000000000000000000000,
 618293049656826371620197206797522978209792]