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A298184
as a simple table
n
a(n)
1
0
2
1
3
1
4
3
5
5
6
10
7
19
8
41
9
81
10
196
11
474
12
1315
13
3871
14
15716
15
68291
16
339947
17
1851904
18
11717321
19
86766476
[0,1,1,3,5,10,19,41,81,196,474,1315,3871,15716, 68291,339947,1851904,11717321,86766476]