A377505 - cp's OEIS frontend

A377505 a(n) is the number of positive integers that have Omega(n) prime factors and these are all <= n.

n	a(n)
1	1
2	1
3	2
4	3
5	3
6	6
7	4
8	20
9	10
10	10
11	5
12	35
13	6
14	21
15	21
16	126
17	7
18	84
19	8
20	120
21	36
22	36
23	9
24	495
25	45
26	45
27	165
28	165
29	10
30	220
31	11
32	3003
33	66
34	66
35	66
36	1001
37	12
38	78
39	78
40	1365
41	13
42	455
43	14
44	560
45	560
46	105
47	15
48	11628
49	120
50	680
51	120
52	680
53	16
54	3876
55	136
56	3876
57	136
58	136
59	17
60	4845
61	18

[1, 1, 2, 3, 3, 6, 4, 20, 10, 10, 5, 35, 6, 21, 21, 126, 7, 84, 8, 120, 36, 36, 9, 495, 45, 45, 165, 165, 10, 220, 11, 3003, 66, 66, 66, 1001, 12, 78, 78, 1365, 13, 455, 14, 560, 560, 105, 15, 11628, 120, 680, 120, 680, 16, 3876, 136, 3876, 136, 136, 17, 4845, 18]

cp's OEIS Frontend

A377505 a(n) is the number of positive integers that have Omega(n) prime factors and these are all <= n.

Table of values

List of values