A218443 - cp's OEIS frontend

A218443 a(n) = Sum_{k=0..n} floor(n/(3k+2)).

n	a(n)
0	0
1	0
2	1
3	1
4	2
5	3
6	4
7	4
8	6
9	6
10	8
11	9
12	10
13	10
14	12
15	13
16	15
17	16
18	17
19	17
20	20
21	20
22	22
23	23
24	25
25	26
26	28
27	28
28	30
29	31
30	33
31	33
32	36
33	37
34	39
35	41
36	42
37	42
38	44
39	44
40	48
41	49
42	51
43	51
44	54
45	55
46	57
47	58
48	60
49	60
50	63
51	64
52	66
53	67
54	68
55	70
56	74
57	74
58	76
59	77
60	80
61	80
62	82
63	82
64	85
65	87
66	89
67	89
68	92
69	93
70	97
71	98
72	100
73	100
74	102
75	103
76	105
77	107
78	109
79	109

[0, 0, 1, 1, 2, 3, 4, 4, 6, 6, 8, 9, 10, 10, 12, 13, 15, 16, 17, 17, 20, 20, 22, 23, 25, 26, 28, 28, 30, 31, 33, 33, 36, 37, 39, 41, 42, 42, 44, 44, 48, 49, 51, 51, 54, 55, 57, 58, 60, 60, 63, 64, 66, 67, 68, 70, 74, 74, 76, 77, 80, 80, 82, 82, 85, 87, 89, 89, 92, 93, 97, 98, 100, 100, 102, 103, 105, 107, 109, 109]

cp's OEIS Frontend

A218443 a(n) = Sum_{k=0..n} floor(n/(3k+2)).

Table of values

List of values

n	a(n)
0	0
1	0
2	1
3	1
4	2
5	3
6	4
7	4
8	6
9	6
10	8
11	9
12	10
13	10
14	12
15	13
16	15
17	16
18	17
19	17
20	20
21	20
22	22
23	23
24	25
25	26
26	28
27	28
28	30
29	31
30	33
31	33
32	36
33	37
34	39
35	41
36	42
37	42
38	44
39	44
40	48
41	49
42	51
43	51
44	54
45	55
46	57
47	58
48	60
49	60
50	63
51	64
52	66
53	67
54	68
55	70
56	74
57	74
58	76
59	77
60	80
61	80
62	82
63	82
64	85
65	87
66	89
67	89
68	92
69	93
70	97
71	98
72	100
73	100
74	102
75	103
76	105
77	107
78	109
79	109

n	a(n)
0	0
1	0
2	1
3	1
4	2
5	3
6	4
7	4
8	6
9	6
10	8
11	9
12	10
13	10
14	12
15	13
16	15
17	16
18	17
19	17
20	20
21	20
22	22
23	23
24	25
25	26
26	28
27	28
28	30
29	31
30	33
31	33
32	36
33	37
34	39
35	41
36	42
37	42
38	44
39	44
40	48
41	49
42	51
43	51
44	54
45	55
46	57
47	58
48	60
49	60
50	63
51	64
52	66
53	67
54	68
55	70
56	74
57	74
58	76
59	77
60	80
61	80
62	82
63	82
64	85
65	87
66	89
67	89
68	92
69	93
70	97
71	98
72	100
73	100
74	102
75	103
76	105
77	107
78	109
79	109

n	a(n)
0	0
1	0
2	1
3	1
4	2
5	3
6	4
7	4
8	6
9	6
10	8
11	9
12	10
13	10
14	12
15	13
16	15
17	16
18	17
19	17
20	20
21	20
22	22
23	23
24	25
25	26
26	28
27	28
28	30
29	31
30	33
31	33
32	36
33	37
34	39
35	41
36	42
37	42
38	44
39	44
40	48
41	49
42	51
43	51
44	54
45	55
46	57
47	58
48	60
49	60
50	63
51	64
52	66
53	67
54	68
55	70
56	74
57	74
58	76
59	77
60	80
61	80
62	82
63	82
64	85
65	87
66	89
67	89
68	92
69	93
70	97
71	98
72	100
73	100
74	102
75	103
76	105
77	107
78	109
79	109