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A225989 as a simple table

na(n)
120
23192
3652784
4134432480
528244153600
66052498776192
71314942362273280
8288501497813552640
963776322167821168640
1014182989297327325110272
113169467786802943379238912
12711136363409644515952173056

[20,3192,652784,134432480,28244153600,
 6052498776192,1314942362273280,288501497813552640,
 63776322167821168640,14182989297327325110272,
 3169467786802943379238912,
 711136363409644515952173056]