A262748 - cp's OEIS frontend

A262748 Composite odd numbers m such that q is not equal to -1 (mod p) for every pair p,q 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 present numbers.

n	a(n)
1	9
2	21
3	25
4	27
5	35
6	39
7	49
8	55
9	57
10	77
11	81
12	85
13	93
14	111
15	115
16	117
17	119
18	121
19	125
20	129
21	133
22	143
23	155
24	161
25	169
26	171
27	183
28	185
29	187
30	201
31	203
32	205
33	209
34	215
35	217
36	219
37	235
38	237
39	243
40	247
41	253
42	259
43	265
44	275
45	279
46	289
47	291
48	299
49	301
50	305
51	309
52	319
53	323
54	327
55	329
56	333

[9, 21, 25, 27, 35, 39, 49, 55, 57, 77, 81, 85, 93, 111, 115, 117, 119, 121, 125, 129, 133, 143, 155, 161, 169, 171, 183, 185, 187, 201, 203, 205, 209, 215, 217, 219, 235, 237, 243, 247, 253, 259, 265, 275, 279, 289, 291, 299, 301, 305, 309, 319, 323, 327, 329, 333]

cp's OEIS Frontend

A262748 Composite odd numbers m such that q is not equal to -1 (mod p) for every pair p,q 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 present numbers.

Table of values

List of values

n	a(n)
1	9
2	21
3	25
4	27
5	35
6	39
7	49
8	55
9	57
10	77
11	81
12	85
13	93
14	111
15	115
16	117
17	119
18	121
19	125
20	129
21	133
22	143
23	155
24	161
25	169
26	171
27	183
28	185
29	187
30	201
31	203
32	205
33	209
34	215
35	217
36	219
37	235
38	237
39	243
40	247
41	253
42	259
43	265
44	275
45	279
46	289
47	291
48	299
49	301
50	305
51	309
52	319
53	323
54	327
55	329
56	333

n	a(n)
1	9
2	21
3	25
4	27
5	35
6	39
7	49
8	55
9	57
10	77
11	81
12	85
13	93
14	111
15	115
16	117
17	119
18	121
19	125
20	129
21	133
22	143
23	155
24	161
25	169
26	171
27	183
28	185
29	187
30	201
31	203
32	205
33	209
34	215
35	217
36	219
37	235
38	237
39	243
40	247
41	253
42	259
43	265
44	275
45	279
46	289
47	291
48	299
49	301
50	305
51	309
52	319
53	323
54	327
55	329
56	333

n	a(n)
1	9
2	21
3	25
4	27
5	35
6	39
7	49
8	55
9	57
10	77
11	81
12	85
13	93
14	111
15	115
16	117
17	119
18	121
19	125
20	129
21	133
22	143
23	155
24	161
25	169
26	171
27	183
28	185
29	187
30	201
31	203
32	205
33	209
34	215
35	217
36	219
37	235
38	237
39	243
40	247
41	253
42	259
43	265
44	275
45	279
46	289
47	291
48	299
49	301
50	305
51	309
52	319
53	323
54	327
55	329
56	333