A085819 - OEIS

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A085819 as a simple table

n	a(n)
1	1
2	2
3	6
4	12
5	60
6	420
7	4620
8	9240
9	27720
10	360360
11	6126120
12	116396280
13	2677114440
14	77636318760
15	2406725881560
16	4813451763120
17	178097715235440
18	7302006324653040
19	313986271960080720
20	14757354782123793840

[1,2,6,12,60,420,4620,9240,27720,360360,6126120, 116396280,2677114440,77636318760,2406725881560, 4813451763120,178097715235440,7302006324653040, 313986271960080720,14757354782123793840]