A185693 - OEIS

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A185693 as a simple table

n	a(n)
1	2
2	6
3	30
4	210
5	2730
6	30030
7	570570
8	9699690
9	281291010
10	6469693230
11	239378649510
12	10293281928930
13	319091739796830
14	14997311770451010
15	614889782588491410
16	37508276737897976010
17	1987938667108592728530

[2,6,30,210,2730,30030,570570,9699690,281291010, 6469693230,239378649510,10293281928930, 319091739796830,14997311770451010, 614889782588491410,37508276737897976010, 1987938667108592728530]