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A056496 as a simple table

na(n)
15
210
320
460
5120
6340
7620
81800
93100
109240
1115620
1246440
1378120
14233740
15390480
161170000
171953120
185855900
199765620
2029287440
2148827480
22146468740
23244140620
24732373200
251220703000
263662031240

[5,10,20,60,120,340,620,1800,3100,9240,15620,
 46440,78120,233740,390480,1170000,1953120,5855900,
 9765620,29287440,48827480,146468740,244140620,
 732373200,1220703000,3662031240]