A016203 - OEIS

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A016203 as a simple table

n	a(n)
0	1
1	11
2	95
3	775
4	6231
5	49911
6	399415
7	3195575
8	25565111
9	204521911
10	1636177335
11	13089422775
12	104715390391
13	837723139511
14	6701785148855
15	53614281256375
16	428914250182071
17	3431314001718711
18	27450512014273975

[1,11,95,775,6231,49911,399415,3195575,25565111, 204521911,1636177335,13089422775,104715390391, 837723139511,6701785148855,53614281256375, 428914250182071,3431314001718711, 27450512014273975]