A179926 - cp's OEIS frontend

A179926 Number of permutations of the divisors of n of the form d_1=n, d_2, d_3, ..., d_tau(n) such that d_(i+1)/d_i is a prime or 1/prime for all i.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	2
11	1
12	3
13	1
14	2
15	2
16	1
17	1
18	3
19	1
20	3
21	2
22	2
23	1
24	4
25	1
26	2
27	1
28	3
29	1
30	18
31	1
32	1
33	2
34	2
35	2
36	8
37	1
38	2
39	2
40	4
41	1
42	18
43	1
44	3
45	3
46	2
47	1
48	5
49	1
50	3
51	2
52	3
53	1
54	4
55	2
56	4
57	2
58	2
59	1
60	106
61	1
62	2
63	3
64	1
65	2
66	18
67	1
68	3
69	2
70	18
71	1
72	17
73	1
74	2
75	3
76	3
77	2
78	18
79	1
80	5
81	1
82	2
83	1
84	106
85	2
86	2
87	2
88	4
89	1
90	106
91	2
92	3
93	2
94	2
95	2
96	6
97	1
98	3
99	3
100	8
101	1
102	18
103	1
104	4
105	18
106	2
107	1
108	17
109	1
110	18
111	2
112	5
113	1
114	18
115	2
116	3
117	3
118	2
119	2
120	572

[1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 3, 1, 2, 2, 1, 1, 3, 1, 3, 2, 2, 1, 4, 1, 2, 1, 3, 1, 18, 1, 1, 2, 2, 2, 8, 1, 2, 2, 4, 1, 18, 1, 3, 3, 2, 1, 5, 1, 3, 2, 3, 1, 4, 2, 4, 2, 2, 1, 106, 1, 2, 3, 1, 2, 18, 1, 3, 2, 18, 1, 17, 1, 2, 3, 3, 2, 18, 1, 5, 1, 2, 1, 106, 2, 2, 2, 4, 1, 106, 2, 3, 2, 2, 2, 6, 1, 3, 3, 8, 1, 18, 1, 4, 18, 2, 1, 17, 1, 18, 2, 5, 1, 18, 2, 3, 3, 2, 2, 572]

cp's OEIS Frontend

A179926 Number of permutations of the divisors of n of the form d_1=n, d_2, d_3, ..., d_tau(n) such that d_(i+1)/d_i is a prime or 1/prime for all i.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	2
11	1
12	3
13	1
14	2
15	2
16	1
17	1
18	3
19	1
20	3
21	2
22	2
23	1
24	4
25	1
26	2
27	1
28	3
29	1
30	18
31	1
32	1
33	2
34	2
35	2
36	8
37	1
38	2
39	2
40	4
41	1
42	18
43	1
44	3
45	3
46	2
47	1
48	5
49	1
50	3
51	2
52	3
53	1
54	4
55	2
56	4
57	2
58	2
59	1
60	106
61	1
62	2
63	3
64	1
65	2
66	18
67	1
68	3
69	2
70	18
71	1
72	17
73	1
74	2
75	3
76	3
77	2
78	18
79	1
80	5
81	1
82	2
83	1
84	106
85	2
86	2
87	2
88	4
89	1
90	106
91	2
92	3
93	2
94	2
95	2
96	6
97	1
98	3
99	3
100	8
101	1
102	18
103	1
104	4
105	18
106	2
107	1
108	17
109	1
110	18
111	2
112	5
113	1
114	18
115	2
116	3
117	3
118	2
119	2
120	572

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	2
11	1
12	3
13	1
14	2
15	2
16	1
17	1
18	3
19	1
20	3
21	2
22	2
23	1
24	4
25	1
26	2
27	1
28	3
29	1
30	18
31	1
32	1
33	2
34	2
35	2
36	8
37	1
38	2
39	2
40	4
41	1
42	18
43	1
44	3
45	3
46	2
47	1
48	5
49	1
50	3
51	2
52	3
53	1
54	4
55	2
56	4
57	2
58	2
59	1
60	106
61	1
62	2
63	3
64	1
65	2
66	18
67	1
68	3
69	2
70	18
71	1
72	17
73	1
74	2
75	3
76	3
77	2
78	18
79	1
80	5
81	1
82	2
83	1
84	106
85	2
86	2
87	2
88	4
89	1
90	106
91	2
92	3
93	2
94	2
95	2
96	6
97	1
98	3
99	3
100	8
101	1
102	18
103	1
104	4
105	18
106	2
107	1
108	17
109	1
110	18
111	2
112	5
113	1
114	18
115	2
116	3
117	3
118	2
119	2
120	572

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	1
10	2
11	1
12	3
13	1
14	2
15	2
16	1
17	1
18	3
19	1
20	3
21	2
22	2
23	1
24	4
25	1
26	2
27	1
28	3
29	1
30	18
31	1
32	1
33	2
34	2
35	2
36	8
37	1
38	2
39	2
40	4
41	1
42	18
43	1
44	3
45	3
46	2
47	1
48	5
49	1
50	3
51	2
52	3
53	1
54	4
55	2
56	4
57	2
58	2
59	1
60	106
61	1
62	2
63	3
64	1
65	2
66	18
67	1
68	3
69	2
70	18
71	1
72	17
73	1
74	2
75	3
76	3
77	2
78	18
79	1
80	5
81	1
82	2
83	1
84	106
85	2
86	2
87	2
88	4
89	1
90	106
91	2
92	3
93	2
94	2
95	2
96	6
97	1
98	3
99	3
100	8
101	1
102	18
103	1
104	4
105	18
106	2
107	1
108	17
109	1
110	18
111	2
112	5
113	1
114	18
115	2
116	3
117	3
118	2
119	2
120	572