A219729 - cp's OEIS frontend

A219729 Sum_{x <= n} largest divisor of x that is <= sqrt(x).

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	8
7	9
8	11
9	14
10	16
11	17
12	20
13	21
14	23
15	26
16	30
17	31
18	34
19	35
20	39
21	42
22	44
23	45
24	49
25	54
26	56
27	59
28	63
29	64
30	69
31	70
32	74
33	77
34	79
35	84
36	90
37	91
38	93
39	96
40	101
41	102
42	108
43	109
44	113
45	118
46	120
47	121
48	127
49	134
50	139
51	142
52	146
53	147
54	153
55	158
56	165
57	168
58	170
59	171
60	177
61	178

[1, 2, 3, 5, 6, 8, 9, 11, 14, 16, 17, 20, 21, 23, 26, 30, 31, 34, 35, 39, 42, 44, 45, 49, 54, 56, 59, 63, 64, 69, 70, 74, 77, 79, 84, 90, 91, 93, 96, 101, 102, 108, 109, 113, 118, 120, 121, 127, 134, 139, 142, 146, 147, 153, 158, 165, 168, 170, 171, 177, 178]

cp's OEIS Frontend

A219729 Sum_{x <= n} largest divisor of x that is <= sqrt(x).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	8
7	9
8	11
9	14
10	16
11	17
12	20
13	21
14	23
15	26
16	30
17	31
18	34
19	35
20	39
21	42
22	44
23	45
24	49
25	54
26	56
27	59
28	63
29	64
30	69
31	70
32	74
33	77
34	79
35	84
36	90
37	91
38	93
39	96
40	101
41	102
42	108
43	109
44	113
45	118
46	120
47	121
48	127
49	134
50	139
51	142
52	146
53	147
54	153
55	158
56	165
57	168
58	170
59	171
60	177
61	178

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	8
7	9
8	11
9	14
10	16
11	17
12	20
13	21
14	23
15	26
16	30
17	31
18	34
19	35
20	39
21	42
22	44
23	45
24	49
25	54
26	56
27	59
28	63
29	64
30	69
31	70
32	74
33	77
34	79
35	84
36	90
37	91
38	93
39	96
40	101
41	102
42	108
43	109
44	113
45	118
46	120
47	121
48	127
49	134
50	139
51	142
52	146
53	147
54	153
55	158
56	165
57	168
58	170
59	171
60	177
61	178

n	a(n)
1	1
2	2
3	3
4	5
5	6
6	8
7	9
8	11
9	14
10	16
11	17
12	20
13	21
14	23
15	26
16	30
17	31
18	34
19	35
20	39
21	42
22	44
23	45
24	49
25	54
26	56
27	59
28	63
29	64
30	69
31	70
32	74
33	77
34	79
35	84
36	90
37	91
38	93
39	96
40	101
41	102
42	108
43	109
44	113
45	118
46	120
47	121
48	127
49	134
50	139
51	142
52	146
53	147
54	153
55	158
56	165
57	168
58	170
59	171
60	177
61	178