A028422 - cp's OEIS frontend

A028422 Number of ways n can be properly factored.

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

[0, 0, 0, 1, 0, 1, 0, 2, 1, 1, 0, 3, 0, 1, 1, 4, 0, 3, 0, 3, 1, 1, 0, 6, 1, 1, 2, 3, 0, 4, 0, 6, 1, 1, 1, 8, 0, 1, 1, 6, 0, 4, 0, 3, 3, 1, 0, 11, 1, 3, 1, 3, 0, 6, 1, 6, 1, 1, 0, 10, 0, 1, 3, 10, 1, 4, 0, 3, 1, 4, 0, 15, 0, 1, 3, 3, 1, 4, 0, 11, 4, 1, 0, 10, 1, 1, 1, 6, 0, 10]

cp's OEIS Frontend

A028422 Number of ways n can be properly factored.

Table of values

List of values

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

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

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