A115074 - cp's OEIS frontend

A115074 a(n) is the largest prime dividing the n-th nonsquarefree positive integer.

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

[2, 2, 3, 3, 2, 3, 5, 3, 5, 3, 7, 2, 3, 5, 11, 5, 3, 7, 5, 13, 3, 7, 5, 7, 2, 17, 3, 5, 19, 5, 3, 7, 11, 5, 23, 3, 7, 11, 5, 13, 3, 7, 29, 13, 5, 11, 31, 5, 7, 2, 11, 5, 17, 7, 3, 7, 37, 5, 19, 17, 13, 5, 3, 41, 7, 13, 19, 43, 7, 11, 5, 23, 47, 7, 3, 7, 11, 5, 17, 23, 13, 53, 3, 11, 7, 5, 19, 29, 13]

cp's OEIS Frontend

A115074 a(n) is the largest prime dividing the n-th nonsquarefree positive integer.

Table of values

List of values

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

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

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