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A004292 as a simple table

na(n)
01
120
2360
36460
4115920
52080100
637325880
7669785740
812018817440
9215668928180
103870021889800
1169444725088220
121246135029698160
1322360985809478660
14401251609540917720
157200167985927040300

[1,20,360,6460,115920,2080100,37325880,669785740,
 12018817440,215668928180,3870021889800,
 69444725088220,1246135029698160,22360985809478660,
 401251609540917720,7200167985927040300]