A261341 - OEIS

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A261341 as a simple table

n	a(n)
1	1
2	2
3	4
4	6
5	12
6	30
7	36
8	42
9	72
10	240
11	420
12	600
13	900
14	1560
15	1764
16	3600
17	6084
18	8100
19	46440
20	1742400
21	4062240
22	35814240

[1,2,4,6,12,30,36,42,72,240,420,600,900,1560,1764, 3600,6084,8100,46440,1742400,4062240,35814240]