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A181204 as a simple table

na(n)
10
20
30
40
54
60
70
830
930
100
110
12168
13756
14168
150
160
17840
1816632
1916632
20840
210
220
233960
24360360
251729728
26360360
273960
280
290
3018018
317876440
32199536480
33199536480
347876440
3518018
360
370
3880080
39174594420
4025241364720
41140229804000
4225241364720

[0,0,0,0,4,0,0,30,30,0,0,168,756,168,0,0,840,
 16632,16632,840,0,0,3960,360360,1729728,360360,
 3960,0,0,18018,7876440,199536480,199536480,
 7876440,18018,0,0,80080,174594420,25241364720,
 140229804000,25241364720]