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A009168 as a simple table

na(n)
01
10
212
3480
425872
52031360
6227781312
734846855680
86932161765632
91724433365360640
10521307469175442432
11187630895361738301440
1279180079598904589094912
1338701262478049196612321280

[1,0,12,480,25872,2031360,227781312,34846855680,
 6932161765632,1724433365360640,521307469175442432,
 187630895361738301440,79180079598904589094912,
 38701262478049196612321280]