A050371 - cp's OEIS frontend

A050371 Number of factorizations into composite numbers indexed by prime signatures. A050370(A025487).

n	a(n)
1	1
2	0
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	2
11	3
12	3
13	3
14	4
15	4
16	5
17	5
18	4
19	8
20	6
21	7
22	4
23	8
24	9
25	7
26	11
27	12
28	11
29	8
30	13
31	14
32	8
33	19
34	21
35	15
36	16
37	22
38	16
39	23
40	12
41	23
42	26
43	20
44	26
45	36
46	22
47	29
48	35
49	29
50	34
51	14
52	44
53	41
54	11
55	40
56	40
57	58
58	30
59	50
60	54
61	57
62	52
63	21
64	75
65	56
66	28
67	77
68	69
69	61
70	92
71	42
72	50

[1, 0, 1, 1, 1, 1, 2, 2, 1, 2, 3, 3, 3, 4, 4, 5, 5, 4, 8, 6, 7, 4, 8, 9, 7, 11, 12, 11, 8, 13, 14, 8, 19, 21, 15, 16, 22, 16, 23, 12, 23, 26, 20, 26, 36, 22, 29, 35, 29, 34, 14, 44, 41, 11, 40, 40, 58, 30, 50, 54, 57, 52, 21, 75, 56, 28, 77, 69, 61, 92, 42, 50]

cp's OEIS Frontend

A050371 Number of factorizations into composite numbers indexed by prime signatures. A050370(A025487).

Table of values

List of values

n	a(n)
1	1
2	0
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	2
11	3
12	3
13	3
14	4
15	4
16	5
17	5
18	4
19	8
20	6
21	7
22	4
23	8
24	9
25	7
26	11
27	12
28	11
29	8
30	13
31	14
32	8
33	19
34	21
35	15
36	16
37	22
38	16
39	23
40	12
41	23
42	26
43	20
44	26
45	36
46	22
47	29
48	35
49	29
50	34
51	14
52	44
53	41
54	11
55	40
56	40
57	58
58	30
59	50
60	54
61	57
62	52
63	21
64	75
65	56
66	28
67	77
68	69
69	61
70	92
71	42
72	50

n	a(n)
1	1
2	0
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	2
11	3
12	3
13	3
14	4
15	4
16	5
17	5
18	4
19	8
20	6
21	7
22	4
23	8
24	9
25	7
26	11
27	12
28	11
29	8
30	13
31	14
32	8
33	19
34	21
35	15
36	16
37	22
38	16
39	23
40	12
41	23
42	26
43	20
44	26
45	36
46	22
47	29
48	35
49	29
50	34
51	14
52	44
53	41
54	11
55	40
56	40
57	58
58	30
59	50
60	54
61	57
62	52
63	21
64	75
65	56
66	28
67	77
68	69
69	61
70	92
71	42
72	50

n	a(n)
1	1
2	0
3	1
4	1
5	1
6	1
7	2
8	2
9	1
10	2
11	3
12	3
13	3
14	4
15	4
16	5
17	5
18	4
19	8
20	6
21	7
22	4
23	8
24	9
25	7
26	11
27	12
28	11
29	8
30	13
31	14
32	8
33	19
34	21
35	15
36	16
37	22
38	16
39	23
40	12
41	23
42	26
43	20
44	26
45	36
46	22
47	29
48	35
49	29
50	34
51	14
52	44
53	41
54	11
55	40
56	40
57	58
58	30
59	50
60	54
61	57
62	52
63	21
64	75
65	56
66	28
67	77
68	69
69	61
70	92
71	42
72	50