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A203684 as a simple table

na(n)
15
2340
3353600
45816012800
51526121758720000
66402581345767260160000
7429696185755224300427673600000
8461389806400964771465272438344908800000
97926646754442012918793099237780758028353536000000

[5,340,353600,5816012800,1526121758720000,
 6402581345767260160000,
 429696185755224300427673600000,
 461389806400964771465272438344908800000,
 7926646754442012918793099237780758028353536000000]