A145610 - OEIS

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A145610 as a simple table

n	a(n)
1	2
2	12
3	20
4	280
5	2520
6	27720
7	360360
8	720720
9	4084080
10	15519504
11	5173168
12	356948592
13	8923714800
14	80313433200
15	2329089562800
16	144403552893600
17	13127595717600
18	13127595717600
19	485721041551200
20	485721041551200

[2,12,20,280,2520,27720,360360,720720,4084080, 15519504,5173168,356948592,8923714800,80313433200, 2329089562800,144403552893600,13127595717600, 13127595717600,485721041551200,485721041551200]