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A165739
as a simple table
n
a(n)
1
4
2
3
3
8
4
13
5
27
6
49
7
99
8
180
9
330
10
567
11
957
12
1546
13
2479
14
3865
[4,3,8,13,27,49,99,180,330,567,957,1546,2479,3865]