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A088402
as a simple table
n
a(n)
1
2
2
4
3
6
4
8
5
1
6
3
7
5
8
7
9
9
10
11
11
13
12
15
13
17
14
19
15
39
16
59
17
79
18
99
19
119
20
139
21
159
22
179
23
199
24
399
[2,4,6,8,1,3,5,7,9,11,13,15,17,19,39,59,79,99,119, 139,159,179,199,399]