A333450 - cp's OEIS frontend

A333450 a(n) = Sum_{k=1..n} mu(k) * prime(floor(n/k)).

n	a(n)
1	2
2	1
3	1
4	2
5	4
6	5
7	7
8	7
9	9
10	12
11	12
12	15
13	17
14	16
15	16
16	20
17	24
18	22
19	26
20	23
21	21
22	26
23	28
24	28
25	32
26	33
27	31
28	32
29	32
30	29
31	41
32	39
33	43
34	40
35	44
36	40
37	44
38	45
39	45
40	47
41	51
42	52
43	60
44	55
45	53
46	52
47	62
48	64
49	64
50	56
51	54
52	55
53	55
54	65
55	67
56	69
57	69
58	70
59	74
60	73
61	73
62	70
63	80
64	80
65	76
66	69
67	81
68	84
69	90
70	81
71	83
72	87
73	93
74	94

[2, 1, 1, 2, 4, 5, 7, 7, 9, 12, 12, 15, 17, 16, 16, 20, 24, 22, 26, 23, 21, 26, 28, 28, 32, 33, 31, 32, 32, 29, 41, 39, 43, 40, 44, 40, 44, 45, 45, 47, 51, 52, 60, 55, 53, 52, 62, 64, 64, 56, 54, 55, 55, 65, 67, 69, 69, 70, 74, 73, 73, 70, 80, 80, 76, 69, 81, 84, 90, 81, 83, 87, 93, 94]

cp's OEIS Frontend

A333450 a(n) = Sum_{k=1..n} mu(k) * prime(floor(n/k)).

Table of values

List of values

n	a(n)
1	2
2	1
3	1
4	2
5	4
6	5
7	7
8	7
9	9
10	12
11	12
12	15
13	17
14	16
15	16
16	20
17	24
18	22
19	26
20	23
21	21
22	26
23	28
24	28
25	32
26	33
27	31
28	32
29	32
30	29
31	41
32	39
33	43
34	40
35	44
36	40
37	44
38	45
39	45
40	47
41	51
42	52
43	60
44	55
45	53
46	52
47	62
48	64
49	64
50	56
51	54
52	55
53	55
54	65
55	67
56	69
57	69
58	70
59	74
60	73
61	73
62	70
63	80
64	80
65	76
66	69
67	81
68	84
69	90
70	81
71	83
72	87
73	93
74	94

n	a(n)
1	2
2	1
3	1
4	2
5	4
6	5
7	7
8	7
9	9
10	12
11	12
12	15
13	17
14	16
15	16
16	20
17	24
18	22
19	26
20	23
21	21
22	26
23	28
24	28
25	32
26	33
27	31
28	32
29	32
30	29
31	41
32	39
33	43
34	40
35	44
36	40
37	44
38	45
39	45
40	47
41	51
42	52
43	60
44	55
45	53
46	52
47	62
48	64
49	64
50	56
51	54
52	55
53	55
54	65
55	67
56	69
57	69
58	70
59	74
60	73
61	73
62	70
63	80
64	80
65	76
66	69
67	81
68	84
69	90
70	81
71	83
72	87
73	93
74	94

n	a(n)
1	2
2	1
3	1
4	2
5	4
6	5
7	7
8	7
9	9
10	12
11	12
12	15
13	17
14	16
15	16
16	20
17	24
18	22
19	26
20	23
21	21
22	26
23	28
24	28
25	32
26	33
27	31
28	32
29	32
30	29
31	41
32	39
33	43
34	40
35	44
36	40
37	44
38	45
39	45
40	47
41	51
42	52
43	60
44	55
45	53
46	52
47	62
48	64
49	64
50	56
51	54
52	55
53	55
54	65
55	67
56	69
57	69
58	70
59	74
60	73
61	73
62	70
63	80
64	80
65	76
66	69
67	81
68	84
69	90
70	81
71	83
72	87
73	93
74	94