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A222425 as a simple table

na(n)
10
20
34
413
536
6132
7584
82054
97700
1029208
11113024
12428784
131637248
146322400
1524241600
1693878180
17360819968
181402924464
195410402304
2021069262688
2181508818720
22317854067456
231233012730240
244813042237968
2518714480000512

[0,0,4,13,36,132,584,2054,7700,29208,113024,
 428784,1637248,6322400,24241600,93878180,
 360819968,1402924464,5410402304,21069262688,
 81508818720,317854067456,1233012730240,
 4813042237968,18714480000512]