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A268965 as a simple table

na(n)
19
260
3336
41728
58448
639936
7184320
8835584
93735552
1016515072
1172351744
12314572800
131358954496
145838471168
1524964497408
16106300440576
17450971566080
181906965479424
198040178778112
2033809982554112
21141836999983104

[9,60,336,1728,8448,39936,184320,835584,3735552,
 16515072,72351744,314572800,1358954496,5838471168,
 24964497408,106300440576,450971566080,
 1906965479424,8040178778112,33809982554112,
 141836999983104]