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A290031 as a simple table

na(n)
00
10
20
316
4128
5640
62560
78960
828672
986016
10245760
11675840
121802240
134685824
1411927552
1529818880
1673400320
17178257920
18427819008
191016070144
202390753280
215578424320
2212918456320
2329712449536
2467914170368
25154350387200
26348966092800
27785173708800
281758789107712

[0,0,0,16,128,640,2560,8960,28672,86016,245760,
 675840,1802240,4685824,11927552,29818880,73400320,
 178257920,427819008,1016070144,2390753280,
 5578424320,12918456320,29712449536,67914170368,
 154350387200,348966092800,785173708800,
 1758789107712]