A332510 - cp's OEIS frontend

A332510 a(n) = Sum_{k=1..n} lambda(floor(n/k)), where lambda = A008836.

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

[1, 0, 1, 2, 1, 2, 1, 2, 5, 2, 1, 4, 5, 4, 3, 4, 3, 6, 7, 6, 7, 4, 3, 8, 7, 6, 7, 8, 9, 8, 9, 10, 11, 8, 5, 10, 9, 10, 11, 10, 9, 12, 13, 12, 13, 12, 11, 16, 17, 12, 13, 12, 13, 16, 13, 14, 15, 14, 13, 16, 15, 16, 17, 20, 19, 18, 19, 18, 19, 14, 15, 22, 23, 22, 19, 22, 21, 20, 21, 20, 23, 20, 19, 26, 23]

cp's OEIS Frontend

A332510 a(n) = Sum_{k=1..n} lambda(floor(n/k)), where lambda = A008836.

Table of values

List of values

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

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

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