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A204432 as a simple table

na(n)
12
21
39
440
5132
61032
77824
851912
9530712
105619456
1153529984
12707802624
139591229440
14119716185600
151938416832000
1632061464064000
17496487584512000
189509523337728000
19185772505605120000
203434389946233344000

[2,1,9,40,132,1032,7824,51912,530712,5619456,
 53529984,707802624,9591229440,119716185600,
 1938416832000,32061464064000,496487584512000,
 9509523337728000,185772505605120000,
 3434389946233344000]