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A291383 as a simple table

na(n)
02
18
228
398
4344
51208
64240
714884
852248
9183408
10643824
112260040
127933504
1327849280
1497760384
15343171984
161204649632
174228727296
1814844261824
1952108375328
20182918006400
21642104016000
222254002082560
237912309005376
2427774878417792
2597499209219328

[2,8,28,98,344,1208,4240,14884,52248,183408,
 643824,2260040,7933504,27849280,97760384,
 343171984,1204649632,4228727296,14844261824,
 52108375328,182918006400,642104016000,
 2254002082560,7912309005376,27774878417792,
 97499209219328]