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A253772
as a simple table
n
a(n)
1
1
2
2
3
4
4
10
5
19
6
32
7
40
8
146
9
566
10
2054
11
9967
12
62639
13
87814
14
141092
[1,2,4,10,19,32,40,146,566,2054,9967,62639,87814, 141092]