A332768 - cp's OEIS frontend

A332768 a(n) is the greatest prime factor of A180045(n).

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

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

cp's OEIS Frontend

A332768 a(n) is the greatest prime factor of A180045(n).

Table of values

List of values

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

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

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