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A055772 as a simple table

na(n)
11
21
31
42
52
612
712
824
972
10720
11720
121440
131440
1410080
1530240
16120960
17120960
18725760
19725760
207257600
217257600
2279833600
2379833600
24958003200
254790016000
2662270208000
27186810624000
282615348736000
292615348736000
3015692092416000

[1,1,1,2,2,12,12,24,72,720,720,1440,1440,10080,
 30240,120960,120960,725760,725760,7257600,7257600,
 79833600,79833600,958003200,4790016000,
 62270208000,186810624000,2615348736000,
 2615348736000,15692092416000]