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A319910
as a simple table
n
a(n)
1
1
2
3
3
6
4
11
5
23
6
48
7
85
8
178
9
331
10
619
11
1176
12
2183
13
3876
14
7013
15
12447
16
21719
17
37628
18
64570
19
109723
20
185055
[1,3,6,11,23,48,85,178,331,619,1176,2183,3876, 7013,12447,21719,37628,64570,109723,185055]