A272605 - cp's OEIS frontend

A272605 a(1) = 1, for n>=1 a(n) is the largest prime factor of A002182(n).

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

[1, 2, 2, 3, 3, 3, 3, 3, 5, 5, 5, 5, 5, 5, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 11, 7, 7, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 17, 13, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 19, 17, 17, 19, 19, 17, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 23, 19, 23, 19]

cp's OEIS Frontend

A272605 a(1) = 1, for n>=1 a(n) is the largest prime factor of A002182(n).

Table of values

List of values

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

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

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