A050331 - cp's OEIS frontend

A050331 Number of factorizations into numbers with an odd number of prime factors indexed by prime signatures. A050330(A025487).

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

[1, 1, 1, 1, 2, 2, 2, 3, 2, 3, 3, 4, 4, 4, 5, 6, 6, 5, 8, 7, 8, 5, 9, 10, 6, 11, 13, 11, 9, 13, 14, 8, 16, 20, 14, 17, 20, 15, 21, 10, 22, 22, 20, 21, 31, 19, 27, 29, 26, 29, 12, 37, 30, 12, 36, 32, 46, 24, 42, 41, 44, 40, 15, 58, 40, 27, 61, 48, 49, 66, 31, 43, 63, 64, 56, 70, 68]

cp's OEIS Frontend

A050331 Number of factorizations into numbers with an odd number of prime factors indexed by prime signatures. A050330(A025487).

Table of values

List of values

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

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

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