A339667 - cp's OEIS frontend

A339667 Number of nonempty subsets of divisors of n having a common factor > 1.

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	5
7	1
8	7
9	3
10	5
11	1
12	19
13	1
14	5
15	5
16	15
17	1
18	19
19	1
20	19
21	5
22	5
23	1
24	71
25	3
26	5
27	7
28	19
29	1
30	37
31	1
32	31
33	5
34	5
35	5
36	111
37	1
38	5
39	5
40	71
41	1
42	37
43	1
44	19
45	19
46	5
47	1
48	271
49	3
50	19
51	5
52	19
53	1
54	71
55	5
56	71
57	5
58	5
59	1
60	347
61	1
62	5
63	19
64	63
65	5
66	37
67	1
68	19
69	5
70	37
71	1
72	703
73	1
74	5
75	19
76	19
77	5
78	37
79	1
80	271

[0, 1, 1, 3, 1, 5, 1, 7, 3, 5, 1, 19, 1, 5, 5, 15, 1, 19, 1, 19, 5, 5, 1, 71, 3, 5, 7, 19, 1, 37, 1, 31, 5, 5, 5, 111, 1, 5, 5, 71, 1, 37, 1, 19, 19, 5, 1, 271, 3, 19, 5, 19, 1, 71, 5, 71, 5, 5, 1, 347, 1, 5, 19, 63, 5, 37, 1, 19, 5, 37, 1, 703, 1, 5, 19, 19, 5, 37, 1, 271]

cp's OEIS Frontend

A339667 Number of nonempty subsets of divisors of n having a common factor > 1.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	5
7	1
8	7
9	3
10	5
11	1
12	19
13	1
14	5
15	5
16	15
17	1
18	19
19	1
20	19
21	5
22	5
23	1
24	71
25	3
26	5
27	7
28	19
29	1
30	37
31	1
32	31
33	5
34	5
35	5
36	111
37	1
38	5
39	5
40	71
41	1
42	37
43	1
44	19
45	19
46	5
47	1
48	271
49	3
50	19
51	5
52	19
53	1
54	71
55	5
56	71
57	5
58	5
59	1
60	347
61	1
62	5
63	19
64	63
65	5
66	37
67	1
68	19
69	5
70	37
71	1
72	703
73	1
74	5
75	19
76	19
77	5
78	37
79	1
80	271

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	5
7	1
8	7
9	3
10	5
11	1
12	19
13	1
14	5
15	5
16	15
17	1
18	19
19	1
20	19
21	5
22	5
23	1
24	71
25	3
26	5
27	7
28	19
29	1
30	37
31	1
32	31
33	5
34	5
35	5
36	111
37	1
38	5
39	5
40	71
41	1
42	37
43	1
44	19
45	19
46	5
47	1
48	271
49	3
50	19
51	5
52	19
53	1
54	71
55	5
56	71
57	5
58	5
59	1
60	347
61	1
62	5
63	19
64	63
65	5
66	37
67	1
68	19
69	5
70	37
71	1
72	703
73	1
74	5
75	19
76	19
77	5
78	37
79	1
80	271

n	a(n)
1	0
2	1
3	1
4	3
5	1
6	5
7	1
8	7
9	3
10	5
11	1
12	19
13	1
14	5
15	5
16	15
17	1
18	19
19	1
20	19
21	5
22	5
23	1
24	71
25	3
26	5
27	7
28	19
29	1
30	37
31	1
32	31
33	5
34	5
35	5
36	111
37	1
38	5
39	5
40	71
41	1
42	37
43	1
44	19
45	19
46	5
47	1
48	271
49	3
50	19
51	5
52	19
53	1
54	71
55	5
56	71
57	5
58	5
59	1
60	347
61	1
62	5
63	19
64	63
65	5
66	37
67	1
68	19
69	5
70	37
71	1
72	703
73	1
74	5
75	19
76	19
77	5
78	37
79	1
80	271