A145662 - OEIS

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A145662 as a simple table

n	a(n)
1	0
2	5
3	55
4	835
5	8365
6	41837
7	209195
8	7321885
9	73218955
10	1098284605
11	5491423277
12	302028282755
13	1510141416085
14	98159192073245
15	490795960391965
16	2453979801983849
17	24539798019883535
18	2085882831690821195

[0,5,55,835,8365,41837,209195,7321885,73218955, 1098284605,5491423277,302028282755,1510141416085, 98159192073245,490795960391965,2453979801983849, 24539798019883535,2085882831690821195]