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A069651 as a simple table

na(n)
01
12
218
31200
4735000
54667544000
6332086420512000
7279394363051195392000
82892376010829659126572800000
9379850021025259936655866602240000000
10648304836222110631242066578424390188032000000

[1,2,18,1200,735000,4667544000,332086420512000,
 279394363051195392000,
 2892376010829659126572800000,
 379850021025259936655866602240000000,
 648304836222110631242066578424390188032000000]