A109810 - cp's OEIS frontend

A109810 Number of permutations of the positive divisors of n, where every element is coprime to its adjacent elements.

n	a(n)
1	1
2	2
3	2
4	2
5	2
6	4
7	2
8	0
9	2
10	4
11	2
12	0
13	2
14	4
15	4
16	0
17	2
18	0
19	2
20	0
21	4
22	4
23	2
24	0
25	2
26	4
27	0
28	0
29	2
30	0
31	2
32	0
33	4
34	4
35	4
36	0
37	2
38	4
39	4
40	0
41	2
42	0
43	2
44	0
45	0
46	4
47	2
48	0
49	2
50	0
51	4
52	0
53	2
54	0
55	4
56	0
57	4
58	4
59	2
60	0
61	2
62	4
63	0
64	0
65	4
66	0
67	2
68	0
69	4
70	0
71	2
72	0
73	2
74	4
75	0
76	0
77	4
78	0
79	2
80	0
81	0
82	4
83	2
84	0
85	4
86	4
87	4
88	0
89	2
90	0
91	4
92	0
93	4
94	4
95	4
96	0
97	2
98	0
99	0
100	0
101	2
102	0
103	2
104	0
105	0

[1, 2, 2, 2, 2, 4, 2, 0, 2, 4, 2, 0, 2, 4, 4, 0, 2, 0, 2, 0, 4, 4, 2, 0, 2, 4, 0, 0, 2, 0, 2, 0, 4, 4, 4, 0, 2, 4, 4, 0, 2, 0, 2, 0, 0, 4, 2, 0, 2, 0, 4, 0, 2, 0, 4, 0, 4, 4, 2, 0, 2, 4, 0, 0, 4, 0, 2, 0, 4, 0, 2, 0, 2, 4, 0, 0, 4, 0, 2, 0, 0, 4, 2, 0, 4, 4, 4, 0, 2, 0, 4, 0, 4, 4, 4, 0, 2, 0, 0, 0, 2, 0, 2, 0, 0]

cp's OEIS Frontend

A109810 Number of permutations of the positive divisors of n, where every element is coprime to its adjacent elements.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	2
5	2
6	4
7	2
8	0
9	2
10	4
11	2
12	0
13	2
14	4
15	4
16	0
17	2
18	0
19	2
20	0
21	4
22	4
23	2
24	0
25	2
26	4
27	0
28	0
29	2
30	0
31	2
32	0
33	4
34	4
35	4
36	0
37	2
38	4
39	4
40	0
41	2
42	0
43	2
44	0
45	0
46	4
47	2
48	0
49	2
50	0
51	4
52	0
53	2
54	0
55	4
56	0
57	4
58	4
59	2
60	0
61	2
62	4
63	0
64	0
65	4
66	0
67	2
68	0
69	4
70	0
71	2
72	0
73	2
74	4
75	0
76	0
77	4
78	0
79	2
80	0
81	0
82	4
83	2
84	0
85	4
86	4
87	4
88	0
89	2
90	0
91	4
92	0
93	4
94	4
95	4
96	0
97	2
98	0
99	0
100	0
101	2
102	0
103	2
104	0
105	0

n	a(n)
1	1
2	2
3	2
4	2
5	2
6	4
7	2
8	0
9	2
10	4
11	2
12	0
13	2
14	4
15	4
16	0
17	2
18	0
19	2
20	0
21	4
22	4
23	2
24	0
25	2
26	4
27	0
28	0
29	2
30	0
31	2
32	0
33	4
34	4
35	4
36	0
37	2
38	4
39	4
40	0
41	2
42	0
43	2
44	0
45	0
46	4
47	2
48	0
49	2
50	0
51	4
52	0
53	2
54	0
55	4
56	0
57	4
58	4
59	2
60	0
61	2
62	4
63	0
64	0
65	4
66	0
67	2
68	0
69	4
70	0
71	2
72	0
73	2
74	4
75	0
76	0
77	4
78	0
79	2
80	0
81	0
82	4
83	2
84	0
85	4
86	4
87	4
88	0
89	2
90	0
91	4
92	0
93	4
94	4
95	4
96	0
97	2
98	0
99	0
100	0
101	2
102	0
103	2
104	0
105	0

n	a(n)
1	1
2	2
3	2
4	2
5	2
6	4
7	2
8	0
9	2
10	4
11	2
12	0
13	2
14	4
15	4
16	0
17	2
18	0
19	2
20	0
21	4
22	4
23	2
24	0
25	2
26	4
27	0
28	0
29	2
30	0
31	2
32	0
33	4
34	4
35	4
36	0
37	2
38	4
39	4
40	0
41	2
42	0
43	2
44	0
45	0
46	4
47	2
48	0
49	2
50	0
51	4
52	0
53	2
54	0
55	4
56	0
57	4
58	4
59	2
60	0
61	2
62	4
63	0
64	0
65	4
66	0
67	2
68	0
69	4
70	0
71	2
72	0
73	2
74	4
75	0
76	0
77	4
78	0
79	2
80	0
81	0
82	4
83	2
84	0
85	4
86	4
87	4
88	0
89	2
90	0
91	4
92	0
93	4
94	4
95	4
96	0
97	2
98	0
99	0
100	0
101	2
102	0
103	2
104	0
105	0