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A143598 as a simple table

na(n)
01
12
228
31176
4103440
515726880
63684098496
71232799974784
8558670427013376
9329559835063067136
10245462725323910487040
11225319148634038399801344
12249936012383478860884217856
13329609037187846742271984869376

[1,2,28,1176,103440,15726880,3684098496,
 1232799974784,558670427013376,329559835063067136,
 245462725323910487040,225319148634038399801344,
 249936012383478860884217856,
 329609037187846742271984869376]