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A056836 as a simple table

na(n)
01
16
230
360
4420
51260
613860
727720
8360360
96126120
10116396280
112677114440
125354228880
1326771144400
1480313433200
152329089562800
1672201776446800
172671465728531600
18109530094869795600
194709794079401210800

[1,6,30,60,420,1260,13860,27720,360360,6126120,
 116396280,2677114440,5354228880,26771144400,
 80313433200,2329089562800,72201776446800,
 2671465728531600,109530094869795600,
 4709794079401210800]