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A115780
as a simple table
n
a(n)
0
2
1
0
2
4
3
8
4
14
5
32
6
60
7
140
8
212
9
750
10
1322
11
2540
12
6862
13
13040
14
27174
15
57052
16
117164
17
248360
18
555254
[2,0,4,8,14,32,60,140,212,750,1322,2540,6862, 13040,27174,57052,117164,248360,555254]