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## A020639 as a simple table

n a(n)
1 1
2 2
3 3
4 2
5 5
6 2
7 7
8 2
9 3
10 2
11 11
12 2
13 13
14 2
15 3
16 2
17 17
18 2
19 19
20 2
21 3
22 2
23 23
24 2
25 5
26 2
27 3
28 2
29 29
30 2
31 31
32 2
33 3
34 2
35 5
36 2
37 37
38 2
39 3
40 2
41 41
42 2
43 43
44 2
45 3
46 2
47 47
48 2
49 7
50 2
51 3
52 2
53 53
54 2
55 5
56 2
57 3
58 2
59 59
60 2
61 61
62 2
63 3
64 2
65 5
66 2
67 67
68 2
69 3
70 2
71 71
72 2
73 73
74 2
75 3
76 2
77 7
78 2
79 79
80 2
81 3
82 2
83 83
84 2
85 5
86 2
87 3
88 2
89 89
90 2
91 7
92 2
93 3
94 2
95 5
96 2
97 97

 ```[1,2,3,2,5,2,7,2,3,2,11,2,13,2,3,2,17,2,19,2,3,2, 23,2,5,2,3,2,29,2,31,2,3,2,5,2,37,2,3,2,41,2,43,2, 3,2,47,2,7,2,3,2,53,2,5,2,3,2,59,2,61,2,3,2,5,2, 67,2,3,2,71,2,73,2,3,2,7,2,79,2,3,2,83,2,5,2,3,2, 89,2,7,2,3,2,5,2,97]```

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