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A134305
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
40
6
59
7
60
8
61
9
62
10
241
11
276
12
404
13
2159
14
2160
15
2161
[1,2,3,4,40,59,60,61,62,241,276,404,2159,2160, 2161]