A073481 - cp's OEIS frontend

A073481 Least prime factor of the n-th squarefree number.

n	a(n)
1	1
2	2
3	3
4	5
5	2
6	7
7	2
8	11
9	13
10	2
11	3
12	17
13	19
14	3
15	2
16	23
17	2
18	29
19	2
20	31
21	3
22	2
23	5
24	37
25	2
26	3
27	41
28	2
29	43
30	2
31	47
32	3
33	53
34	5
35	3
36	2
37	59
38	61
39	2
40	5
41	2
42	67
43	3
44	2
45	71
46	73
47	2
48	7
49	2
50	79
51	2
52	83
53	5
54	2
55	3
56	89
57	7
58	3
59	2
60	5
61	97
62	101
63	2
64	103
65	3
66	2
67	107
68	109
69	2
70	3
71	113
72	2
73	5
74	2
75	7
76	2
77	3
78	127
79	3
80	2
81	131
82	7
83	2
84	137
85	2
86	139
87	3
88	2
89	11
90	5

[1, 2, 3, 5, 2, 7, 2, 11, 13, 2, 3, 17, 19, 3, 2, 23, 2, 29, 2, 31, 3, 2, 5, 37, 2, 3, 41, 2, 43, 2, 47, 3, 53, 5, 3, 2, 59, 61, 2, 5, 2, 67, 3, 2, 71, 73, 2, 7, 2, 79, 2, 83, 5, 2, 3, 89, 7, 3, 2, 5, 97, 101, 2, 103, 3, 2, 107, 109, 2, 3, 113, 2, 5, 2, 7, 2, 3, 127, 3, 2, 131, 7, 2, 137, 2, 139, 3, 2, 11, 5]

cp's OEIS Frontend

A073481 Least prime factor of the n-th squarefree number.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	2
6	7
7	2
8	11
9	13
10	2
11	3
12	17
13	19
14	3
15	2
16	23
17	2
18	29
19	2
20	31
21	3
22	2
23	5
24	37
25	2
26	3
27	41
28	2
29	43
30	2
31	47
32	3
33	53
34	5
35	3
36	2
37	59
38	61
39	2
40	5
41	2
42	67
43	3
44	2
45	71
46	73
47	2
48	7
49	2
50	79
51	2
52	83
53	5
54	2
55	3
56	89
57	7
58	3
59	2
60	5
61	97
62	101
63	2
64	103
65	3
66	2
67	107
68	109
69	2
70	3
71	113
72	2
73	5
74	2
75	7
76	2
77	3
78	127
79	3
80	2
81	131
82	7
83	2
84	137
85	2
86	139
87	3
88	2
89	11
90	5

n	a(n)
1	1
2	2
3	3
4	5
5	2
6	7
7	2
8	11
9	13
10	2
11	3
12	17
13	19
14	3
15	2
16	23
17	2
18	29
19	2
20	31
21	3
22	2
23	5
24	37
25	2
26	3
27	41
28	2
29	43
30	2
31	47
32	3
33	53
34	5
35	3
36	2
37	59
38	61
39	2
40	5
41	2
42	67
43	3
44	2
45	71
46	73
47	2
48	7
49	2
50	79
51	2
52	83
53	5
54	2
55	3
56	89
57	7
58	3
59	2
60	5
61	97
62	101
63	2
64	103
65	3
66	2
67	107
68	109
69	2
70	3
71	113
72	2
73	5
74	2
75	7
76	2
77	3
78	127
79	3
80	2
81	131
82	7
83	2
84	137
85	2
86	139
87	3
88	2
89	11
90	5

n	a(n)
1	1
2	2
3	3
4	5
5	2
6	7
7	2
8	11
9	13
10	2
11	3
12	17
13	19
14	3
15	2
16	23
17	2
18	29
19	2
20	31
21	3
22	2
23	5
24	37
25	2
26	3
27	41
28	2
29	43
30	2
31	47
32	3
33	53
34	5
35	3
36	2
37	59
38	61
39	2
40	5
41	2
42	67
43	3
44	2
45	71
46	73
47	2
48	7
49	2
50	79
51	2
52	83
53	5
54	2
55	3
56	89
57	7
58	3
59	2
60	5
61	97
62	101
63	2
64	103
65	3
66	2
67	107
68	109
69	2
70	3
71	113
72	2
73	5
74	2
75	7
76	2
77	3
78	127
79	3
80	2
81	131
82	7
83	2
84	137
85	2
86	139
87	3
88	2
89	11
90	5