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A308729 as a simple table

na(n)
10
22
311
461
5379
62668
721160
8187388
91836396
1019753416
11231545016
122939000832
1340172455296
14588444153984
159197306248320
16152803737342720
172689320607107840
1849986863946616320
19978529776749959680
2020123805782225664000
21433785771471677184000
229780622725328777728000

[0,2,11,61,379,2668,21160,187388,1836396,19753416,
 231545016,2939000832,40172455296,588444153984,
 9197306248320,152803737342720,2689320607107840,
 49986863946616320,978529776749959680,
 20123805782225664000,433785771471677184000,
 9780622725328777728000]