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A331864
as a simple table
n
a(n)
1
2
2
3
3
5
4
8
5
9
6
39
7
78
8
81
9
155
10
249
11
387
12
395
13
510
14
711
15
1173
16
1751
17
10245
[2,3,5,8,9,39,78,81,155,249,387,395,510,711,1173, 1751,10245]