A056384 - OEIS

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A056384 as a simple table

n	a(n)
1	5
2	20
3	70
4	350
5	820
6	8030
7	13170
8	102750
9	327050
10	2444780
11	4884430
12	61632150
13	101732420
14	1017309930
15	3816214730
16	19104506250
17	47683838320
18	635787430450
19	1059638680670
20	11924777944650
21	39736963208630

[5,20,70,350,820,8030,13170,102750,327050,2444780, 4884430,61632150,101732420,1017309930,3816214730, 19104506250,47683838320,635787430450, 1059638680670,11924777944650,39736963208630]