A339919 - cp's OEIS frontend

A339919 a(n) = Sum_{k=1..n} (floor(3n/k) - 3floor(n/k)).

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

[0, 0, 0, 1, 1, 3, 1, 5, 4, 4, 5, 9, 5, 7, 10, 10, 8, 13, 8, 16, 13, 11, 15, 19, 14, 15, 18, 21, 18, 22, 17, 23, 22, 22, 26, 30, 18, 24, 29, 31, 28, 31, 26, 32, 33, 29, 32, 42, 32, 35, 34, 36, 39, 41, 40, 42, 37, 40, 41, 53, 38, 44, 49, 47, 47, 47, 43, 53, 52]

cp's OEIS Frontend

A339919 a(n) = Sum_{k=1..n} (floor(3n/k) - 3floor(n/k)).

Table of values

List of values

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

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

cp's OEIS Frontend

A339919 a(n) = Sum_{k=1..n} (floor(3*n/k) - 3*floor(n/k)).

Table of values

List of values

A339919 a(n) = Sum_{k=1..n} (floor(3n/k) - 3floor(n/k)).

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