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A280248 as a simple table

na(n)
11
21
33
412
5120
62160
745360
82903040
9235146240
1047029248000
112586608640000
124469659729920000
13348633458933760000
14307494710779576320000
15553490479403237376000000
162267097003635660292096000000
17308325192494449799725056000000

[1,1,3,12,120,2160,45360,2903040,235146240,
 47029248000,2586608640000,4469659729920000,
 348633458933760000,307494710779576320000,
 553490479403237376000000,
 2267097003635660292096000000,
 308325192494449799725056000000]