A218444 - cp's OEIS frontend

A218444 a(n) = Sum_{k>=0} floor(n/(5*k + 1)).

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	10
10	11
11	13
12	15
13	16
14	17
15	18
16	20
17	21
18	23
19	24
20	25
21	27
22	29
23	30
24	32
25	33
26	35
27	36
28	37
29	38
30	40
31	42
32	44
33	46
34	47
35	48
36	51
37	52
38	53
39	54
40	55
41	57
42	60
43	61
44	63
45	64
46	66
47	67
48	70
49	71
50	72
51	74
52	76
53	77
54	79
55	81
56	83
57	84
58	85
59	86
60	88
61	90
62	92
63	94
64	96
65	97
66	101
67	102
68	103
69	104
70	105

[0, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 13, 15, 16, 17, 18, 20, 21, 23, 24, 25, 27, 29, 30, 32, 33, 35, 36, 37, 38, 40, 42, 44, 46, 47, 48, 51, 52, 53, 54, 55, 57, 60, 61, 63, 64, 66, 67, 70, 71, 72, 74, 76, 77, 79, 81, 83, 84, 85, 86, 88, 90, 92, 94, 96, 97, 101, 102, 103, 104, 105]

cp's OEIS Frontend

A218444 a(n) = Sum_{k>=0} floor(n/(5*k + 1)).

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	10
10	11
11	13
12	15
13	16
14	17
15	18
16	20
17	21
18	23
19	24
20	25
21	27
22	29
23	30
24	32
25	33
26	35
27	36
28	37
29	38
30	40
31	42
32	44
33	46
34	47
35	48
36	51
37	52
38	53
39	54
40	55
41	57
42	60
43	61
44	63
45	64
46	66
47	67
48	70
49	71
50	72
51	74
52	76
53	77
54	79
55	81
56	83
57	84
58	85
59	86
60	88
61	90
62	92
63	94
64	96
65	97
66	101
67	102
68	103
69	104
70	105

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	10
10	11
11	13
12	15
13	16
14	17
15	18
16	20
17	21
18	23
19	24
20	25
21	27
22	29
23	30
24	32
25	33
26	35
27	36
28	37
29	38
30	40
31	42
32	44
33	46
34	47
35	48
36	51
37	52
38	53
39	54
40	55
41	57
42	60
43	61
44	63
45	64
46	66
47	67
48	70
49	71
50	72
51	74
52	76
53	77
54	79
55	81
56	83
57	84
58	85
59	86
60	88
61	90
62	92
63	94
64	96
65	97
66	101
67	102
68	103
69	104
70	105

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	7
7	8
8	9
9	10
10	11
11	13
12	15
13	16
14	17
15	18
16	20
17	21
18	23
19	24
20	25
21	27
22	29
23	30
24	32
25	33
26	35
27	36
28	37
29	38
30	40
31	42
32	44
33	46
34	47
35	48
36	51
37	52
38	53
39	54
40	55
41	57
42	60
43	61
44	63
45	64
46	66
47	67
48	70
49	71
50	72
51	74
52	76
53	77
54	79
55	81
56	83
57	84
58	85
59	86
60	88
61	90
62	92
63	94
64	96
65	97
66	101
67	102
68	103
69	104
70	105