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A056497 as a simple table

na(n)
16
215
330
4105
5210
6705
71290
84410
97740
1026985
1146650
12162435
13279930
14978465
151679370
165874120
1710077690
1835263440
1960466170
20211604295
21362795730
221269743025
232176782330
247618570470
2513060693800

[6,15,30,105,210,705,1290,4410,7740,26985,46650,
 162435,279930,978465,1679370,5874120,10077690,
 35263440,60466170,211604295,362795730,1269743025,
 2176782330,7618570470,13060693800]