A143578 - cp's OEIS frontend

A143578 A positive integer n is included if j+n/j divides k+n/k for every divisor k of n, where j is the largest divisor of n that is <= sqrt(n).

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	11
7	13
8	15
9	17
10	19
11	23
12	29
13	31
14	35
15	37
16	41
17	43
18	47
19	53
20	59
21	61
22	67
23	71
24	73
25	79
26	83
27	89
28	95
29	97
30	101
31	103
32	107
33	109
34	113
35	119
36	127
37	131
38	137
39	139
40	143
41	149
42	151
43	157
44	163
45	167
46	173
47	179
48	181
49	191
50	193
51	197
52	199
53	209
54	211
55	223
56	227
57	229
58	233
59	239
60	241
61	251
62	257
63	263
64	269
65	271
66	277
67	281
68	283
69	287
70	293

[1, 2, 3, 5, 7, 11, 13, 15, 17, 19, 23, 29, 31, 35, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 95, 97, 101, 103, 107, 109, 113, 119, 127, 131, 137, 139, 143, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 209, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 287, 293]

cp's OEIS Frontend

A143578 A positive integer n is included if j+n/j divides k+n/k for every divisor k of n, where j is the largest divisor of n that is <= sqrt(n).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	11
7	13
8	15
9	17
10	19
11	23
12	29
13	31
14	35
15	37
16	41
17	43
18	47
19	53
20	59
21	61
22	67
23	71
24	73
25	79
26	83
27	89
28	95
29	97
30	101
31	103
32	107
33	109
34	113
35	119
36	127
37	131
38	137
39	139
40	143
41	149
42	151
43	157
44	163
45	167
46	173
47	179
48	181
49	191
50	193
51	197
52	199
53	209
54	211
55	223
56	227
57	229
58	233
59	239
60	241
61	251
62	257
63	263
64	269
65	271
66	277
67	281
68	283
69	287
70	293

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	11
7	13
8	15
9	17
10	19
11	23
12	29
13	31
14	35
15	37
16	41
17	43
18	47
19	53
20	59
21	61
22	67
23	71
24	73
25	79
26	83
27	89
28	95
29	97
30	101
31	103
32	107
33	109
34	113
35	119
36	127
37	131
38	137
39	139
40	143
41	149
42	151
43	157
44	163
45	167
46	173
47	179
48	181
49	191
50	193
51	197
52	199
53	209
54	211
55	223
56	227
57	229
58	233
59	239
60	241
61	251
62	257
63	263
64	269
65	271
66	277
67	281
68	283
69	287
70	293

n	a(n)
1	1
2	2
3	3
4	5
5	7
6	11
7	13
8	15
9	17
10	19
11	23
12	29
13	31
14	35
15	37
16	41
17	43
18	47
19	53
20	59
21	61
22	67
23	71
24	73
25	79
26	83
27	89
28	95
29	97
30	101
31	103
32	107
33	109
34	113
35	119
36	127
37	131
38	137
39	139
40	143
41	149
42	151
43	157
44	163
45	167
46	173
47	179
48	181
49	191
50	193
51	197
52	199
53	209
54	211
55	223
56	227
57	229
58	233
59	239
60	241
61	251
62	257
63	263
64	269
65	271
66	277
67	281
68	283
69	287
70	293