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A056286 as a simple table

na(n)
10
20
30
40
50
6120
72160
823940
9211680
101643544
1111748240
1279419180
13516257280
143262443120
1520193277104
16123071707080
17741419995680
184427490147480
1926264144909520
20155018841055596
21911509010154720
225344538384445120
2331272099902089200
24182707081122261480

[0,0,0,0,0,120,2160,23940,211680,1643544,11748240,
 79419180,516257280,3262443120,20193277104,
 123071707080,741419995680,4427490147480,
 26264144909520,155018841055596,911509010154720,
 5344538384445120,31272099902089200,
 182707081122261480]