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A306853
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
261
11
370
12
407
13
52036
14
724212
15
223123410
[1,2,3,4,5,6,7,8,9,261,370,407,52036,724212, 223123410]