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A080553
as a simple table
n
a(n)
0
2
1
2
2
3
3
5
4
9
5
13
6
15
7
25
8
36
9
46
10
45
11
69
12
88
13
113
14
97
15
146
16
175
17
223
18
179
19
264
20
307
21
133
22
43
23
11
24
3
[2,2,3,5,9,13,15,25,36,46,45,69,88,113,97,146,175, 223,179,264,307,133,43,11,3]