A065330 - cp's OEIS frontend

A065330 a(n) = max { k | gcd(n, k) = k and gcd(k, 6) = 1 }.

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

[1, 1, 1, 1, 5, 1, 7, 1, 1, 5, 11, 1, 13, 7, 5, 1, 17, 1, 19, 5, 7, 11, 23, 1, 25, 13, 1, 7, 29, 5, 31, 1, 11, 17, 35, 1, 37, 19, 13, 5, 41, 7, 43, 11, 5, 23, 47, 1, 49, 25, 17, 13, 53, 1, 55, 7, 19, 29, 59, 5, 61, 31, 7, 1, 65, 11, 67, 17, 23, 35, 71, 1, 73, 37, 25, 19, 77, 13, 79, 5, 1]

cp's OEIS Frontend

A065330 a(n) = max { k | gcd(n, k) = k and gcd(k, 6) = 1 }.

Table of values

List of values

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

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

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