A218445 - cp's OEIS frontend

A218445 a(n) = Sum_{k>=0} floor(n/(5*k + 2)).

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

[0, 0, 1, 1, 2, 2, 3, 4, 5, 5, 6, 6, 8, 8, 10, 10, 11, 12, 13, 13, 14, 15, 17, 17, 19, 19, 20, 21, 23, 23, 24, 24, 26, 26, 28, 29, 31, 32, 33, 33, 34, 34, 37, 37, 39, 39, 40, 41, 43, 44, 45, 46, 48, 48, 50, 50, 52, 53, 54, 54, 56, 56, 58, 59, 61, 61, 63, 64, 66, 66, 68, 68, 71, 71, 73, 73, 74, 76, 77, 77, 78]

cp's OEIS Frontend

A218445 a(n) = Sum_{k>=0} floor(n/(5*k + 2)).

Table of values

List of values

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

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

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