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A277650
as a simple table
n
a(n)
1
0
2
1
3
2
4
3
5
4
6
5
7
6
8
7
9
8
10
9
11
10
12
11
13
12
14
30
15
40
16
50
[0,1,2,3,4,5,6,7,8,9,10,11,12,30,40,50]
