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A002897 as a simple table

na(n)
01
18
2216
38000
4343000
516003008
6788889024
740424237568
82131746903000
9114933031928000
106306605327953216
11351047164190381568
1219774031697705428416
131125058699232216000000
1464561313052442296000000

[1,8,216,8000,343000,16003008,788889024,
 40424237568,2131746903000,114933031928000,
 6306605327953216,351047164190381568,
 19774031697705428416,1125058699232216000000,
 64561313052442296000000]