A140286 - OEIS

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A140286 as a simple table

n	a(n)
1	3
2	15
3	99
4	495
5	2079
6	4455
7	36855
8	70875
9	280665
10	1393119
11	4179357
12	12931731
13	32417901
14	161026623
15	514966329
16	1490692005

[3,15,99,495,2079,4455,36855,70875,280665,1393119, 4179357,12931731,32417901,161026623,514966329, 1490692005]

[3,15,99,495,2079,4455,36855,70875,280665,1393119,
 4179357,12931731,32417901,161026623,514966329,
 1490692005]