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A030543
as a simple table
n
a(n)
0
4
1
5
2
6
3
7
4
8
5
9
6
10
7
11
8
12
9
13
10
14
11
15
12
16
13
17
14
18
15
19
16
20
17
21
18
22
19
23
20
24
21
25
22
2
23
3
24
4
25
5
26
2
27
1
[4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21, 22,23,24,25,2,3,4,5,2,1]