A262741 - cp's OEIS frontend

A262741 Composite odd numbers m such that q == -1 (mod p) for at least one pair (p, q) < m satisfying the following two conditions: p is a prime divisor of m, and if a prime divides q then it divides m. These are called absent numbers.

n	a(n)
1	15
2	33
3	45
4	51
5	63
6	65
7	69
8	75
9	87
10	91
11	95
12	99
13	105
14	123
15	135
16	141
17	145
18	147
19	153
20	159
21	165
22	175
23	177
24	189
25	195
26	207
27	213
28	221
29	225
30	231
31	245
32	249
33	255
34	261
35	267
36	273
37	285
38	287
39	295
40	297
41	303
42	315
43	321
44	325
45	339
46	345
47	357
48	363
49	369
50	375
51	385
52	393
53	395
54	399

[15, 33, 45, 51, 63, 65, 69, 75, 87, 91, 95, 99, 105, 123, 135, 141, 145, 147, 153, 159, 165, 175, 177, 189, 195, 207, 213, 221, 225, 231, 245, 249, 255, 261, 267, 273, 285, 287, 295, 297, 303, 315, 321, 325, 339, 345, 357, 363, 369, 375, 385, 393, 395, 399]

cp's OEIS Frontend

A262741 Composite odd numbers m such that q == -1 (mod p) for at least one pair (p, q) < m satisfying the following two conditions: p is a prime divisor of m, and if a prime divides q then it divides m. These are called absent numbers.

Table of values

List of values

n	a(n)
1	15
2	33
3	45
4	51
5	63
6	65
7	69
8	75
9	87
10	91
11	95
12	99
13	105
14	123
15	135
16	141
17	145
18	147
19	153
20	159
21	165
22	175
23	177
24	189
25	195
26	207
27	213
28	221
29	225
30	231
31	245
32	249
33	255
34	261
35	267
36	273
37	285
38	287
39	295
40	297
41	303
42	315
43	321
44	325
45	339
46	345
47	357
48	363
49	369
50	375
51	385
52	393
53	395
54	399

n	a(n)
1	15
2	33
3	45
4	51
5	63
6	65
7	69
8	75
9	87
10	91
11	95
12	99
13	105
14	123
15	135
16	141
17	145
18	147
19	153
20	159
21	165
22	175
23	177
24	189
25	195
26	207
27	213
28	221
29	225
30	231
31	245
32	249
33	255
34	261
35	267
36	273
37	285
38	287
39	295
40	297
41	303
42	315
43	321
44	325
45	339
46	345
47	357
48	363
49	369
50	375
51	385
52	393
53	395
54	399

n	a(n)
1	15
2	33
3	45
4	51
5	63
6	65
7	69
8	75
9	87
10	91
11	95
12	99
13	105
14	123
15	135
16	141
17	145
18	147
19	153
20	159
21	165
22	175
23	177
24	189
25	195
26	207
27	213
28	221
29	225
30	231
31	245
32	249
33	255
34	261
35	267
36	273
37	285
38	287
39	295
40	297
41	303
42	315
43	321
44	325
45	339
46	345
47	357
48	363
49	369
50	375
51	385
52	393
53	395
54	399