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A056350 as a simple table

na(n)
10
20
30
43
524
6136
7612
82616
910480
1041364
11159780
12613919
132341920
148919204
1533905164
16128904660
17490213680
181866117224
197111777860
2027140327757
21103721217388
22396974621676
231521577377012
245840546872280

[0,0,0,3,24,136,612,2616,10480,41364,159780,
 613919,2341920,8919204,33905164,128904660,
 490213680,1866117224,7111777860,27140327757,
 103721217388,396974621676,1521577377012,
 5840546872280]