A014673 - cp's OEIS frontend

A014673 Smallest prime factor of greatest proper divisor of n.

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

[1, 1, 1, 2, 1, 3, 1, 2, 3, 5, 1, 2, 1, 7, 5, 2, 1, 3, 1, 2, 7, 11, 1, 2, 5, 13, 3, 2, 1, 3, 1, 2, 11, 17, 7, 2, 1, 19, 13, 2, 1, 3, 1, 2, 3, 23, 1, 2, 7, 5, 17, 2, 1, 3, 11, 2, 19, 29, 1, 2, 1, 31, 3, 2, 13, 3, 1, 2, 23, 5, 1, 2, 1, 37, 5, 2, 11, 3, 1, 2, 3, 41, 1, 2, 17, 43, 29, 2, 1, 3, 13, 2, 31, 47]

cp's OEIS Frontend

A014673 Smallest prime factor of greatest proper divisor of n.

Table of values

List of values

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

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

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