A095107 - OEIS

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A095107 as a simple table

n	a(n)
1	2
2	6
3	10
4	54
5	106
6	346
7	1410
8	3994
9	12828
10	46242
11	158252
12	542568
13	1865796
14	6822592
15	25120772
16	88926198
17	327561126
18	1212380122
19	4358259840
20	16111686770
21	59936356888

[2,6,10,54,106,346,1410,3994,12828,46242,158252, 542568,1865796,6822592,25120772,88926198, 327561126,1212380122,4358259840,16111686770, 59936356888]