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A317888 as a simple table

na(n)
16
2120
3362880
4355687428096000
58683317618811886495518194401280000000
68247650592082470666723170306785496252186258551345437492922123134388955774976000000000000000

[6,120,362880,355687428096000,
 8683317618811886495518194401280000000,
 82476505920824706667231703067854962521862585513454\
 37492922123134388955774976000000000000000]