A139421 - OEIS

A139421 as a simple table

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	3
7	7
8	3
9	7
10	5
11	11
12	5
13	13
14	7
15	13
16	7
17	17
18	7
19	19
20	7
21	19
22	11
23	23
24	11
25	23
26	13
27	23
28	13
29	29
30	13
31	31
32	13
33	31
34	17
35	31
36	17
37	37
38	19
39	37
40	19
41	41
42	19
43	43
44	19
45	43
46	23
47	47
48	23
49	47
50	23
51	47
52	23
53	53
54	23
55	53
56	23
57	53
58	29
59	59
60	29
61	61
62	31
63	61
64	31
65	61
66	31
67	67
68	31
69	67
70	31
71	71
72	31
73	73
74	37

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

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	3
7	7
8	3
9	7
10	5
11	11
12	5
13	13
14	7
15	13
16	7
17	17
18	7
19	19
20	7
21	19
22	11
23	23
24	11
25	23
26	13
27	23
28	13
29	29
30	13
31	31
32	13
33	31
34	17
35	31
36	17
37	37
38	19
39	37
40	19
41	41
42	19
43	43
44	19
45	43
46	23
47	47
48	23
49	47
50	23
51	47
52	23
53	53
54	23
55	53
56	23
57	53
58	29
59	59
60	29
61	61
62	31
63	61
64	31
65	61
66	31
67	67
68	31
69	67
70	31
71	71
72	31
73	73
74	37

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	3
7	7
8	3
9	7
10	5
11	11
12	5
13	13
14	7
15	13
16	7
17	17
18	7
19	19
20	7
21	19
22	11
23	23
24	11
25	23
26	13
27	23
28	13
29	29
30	13
31	31
32	13
33	31
34	17
35	31
36	17
37	37
38	19
39	37
40	19
41	41
42	19
43	43
44	19
45	43
46	23
47	47
48	23
49	47
50	23
51	47
52	23
53	53
54	23
55	53
56	23
57	53
58	29
59	59
60	29
61	61
62	31
63	61
64	31
65	61
66	31
67	67
68	31
69	67
70	31
71	71
72	31
73	73
74	37

n	a(n)
1	1
2	2
3	3
4	2
5	5
6	3
7	7
8	3
9	7
10	5
11	11
12	5
13	13
14	7
15	13
16	7
17	17
18	7
19	19
20	7
21	19
22	11
23	23
24	11
25	23
26	13
27	23
28	13
29	29
30	13
31	31
32	13
33	31
34	17
35	31
36	17
37	37
38	19
39	37
40	19
41	41
42	19
43	43
44	19
45	43
46	23
47	47
48	23
49	47
50	23
51	47
52	23
53	53
54	23
55	53
56	23
57	53
58	29
59	59
60	29
61	61
62	31
63	61
64	31
65	61
66	31
67	67
68	31
69	67
70	31
71	71
72	31
73	73
74	37