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A067391 as a simple table

na(n)
11
21
32
43
512
620
760
8210
9840
10504
112520
1227720
1327720
1451480
15360360
16180180
17720720
184084080
1912252240
20232792560
21232792560
2221162960
23232792560
245354228880
255354228880
262059318800
2726771144400
2880313433200
2980313433200

[1,1,2,3,12,20,60,210,840,504,2520,27720,27720,
 51480,360360,180180,720720,4084080,12252240,
 232792560,232792560,21162960,232792560,5354228880,
 5354228880,2059318800,26771144400,80313433200,
 80313433200]