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A168467 as a simple table

na(n)
01
16
2720
33628800
41316818944000
552563198423859200000
6327312129899898454671360000000
7428017682605583614976547335700480000000000
8152240508705590071980086429193304853792686080000000000000

[1,6,720,3628800,1316818944000,
 52563198423859200000,
 327312129899898454671360000000,
 428017682605583614976547335700480000000000,
 15224050870559007198008642919330485379268608000000\
 0000000]