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A259517 as a simple table

na(n)
112
238
3120
4380
51204
63816
712096
838344
9121552
10385328
111221520
123872320
1312275584
1438914656
15123362816
16391070784
171239728192
183930045568
1912458584320
2039494789760
21125201899264
22396900848896
231258210017536
243988634573824

[12,38,120,380,1204,3816,12096,38344,121552,
 385328,1221520,3872320,12275584,38914656,
 123362816,391070784,1239728192,3930045568,
 12458584320,39494789760,125201899264,396900848896,
 1258210017536,3988634573824]