A268923 - cp's OEIS frontend

A268923 All odd primes a(n) such that for all odd primes q smaller than a(n) the order of 2 modulo a(n)q is a proper divisor of phi(a(n)q)/2. The totient function phi is given in A000010.

n	a(n)
1	17
2	31
3	41
4	43
5	73
6	89
7	97
8	109
9	113
10	127
11	137
12	151
13	157
14	193
15	223
16	229
17	233
18	241
19	251
20	257
21	277
22	281
23	283
24	307
25	313
26	331
27	337
28	353
29	397
30	401
31	409
32	431
33	433
34	439
35	449
36	457
37	499
38	521
39	569
40	571
41	577
42	593
43	601
44	617
45	631
46	641
47	643
48	673
49	683
50	691
51	727
52	733
53	739
54	761
55	769
56	809
57	811
58	857
59	881
60	911
61	919

[17, 31, 41, 43, 73, 89, 97, 109, 113, 127, 137, 151, 157, 193, 223, 229, 233, 241, 251, 257, 277, 281, 283, 307, 313, 331, 337, 353, 397, 401, 409, 431, 433, 439, 449, 457, 499, 521, 569, 571, 577, 593, 601, 617, 631, 641, 643, 673, 683, 691, 727, 733, 739, 761, 769, 809, 811, 857, 881, 911, 919]

cp's OEIS Frontend

A268923 All odd primes a(n) such that for all odd primes q smaller than a(n) the order of 2 modulo a(n)q is a proper divisor of phi(a(n)q)/2. The totient function phi is given in A000010.

Table of values

List of values

n	a(n)
1	17
2	31
3	41
4	43
5	73
6	89
7	97
8	109
9	113
10	127
11	137
12	151
13	157
14	193
15	223
16	229
17	233
18	241
19	251
20	257
21	277
22	281
23	283
24	307
25	313
26	331
27	337
28	353
29	397
30	401
31	409
32	431
33	433
34	439
35	449
36	457
37	499
38	521
39	569
40	571
41	577
42	593
43	601
44	617
45	631
46	641
47	643
48	673
49	683
50	691
51	727
52	733
53	739
54	761
55	769
56	809
57	811
58	857
59	881
60	911
61	919

n	a(n)
1	17
2	31
3	41
4	43
5	73
6	89
7	97
8	109
9	113
10	127
11	137
12	151
13	157
14	193
15	223
16	229
17	233
18	241
19	251
20	257
21	277
22	281
23	283
24	307
25	313
26	331
27	337
28	353
29	397
30	401
31	409
32	431
33	433
34	439
35	449
36	457
37	499
38	521
39	569
40	571
41	577
42	593
43	601
44	617
45	631
46	641
47	643
48	673
49	683
50	691
51	727
52	733
53	739
54	761
55	769
56	809
57	811
58	857
59	881
60	911
61	919

cp's OEIS Frontend

A268923 All odd primes a(n) such that for all odd primes q smaller than a(n) the order of 2 modulo a(n)*q is a proper divisor of phi(a(n)*q)/2. The totient function phi is given in A000010.

Table of values

List of values

A268923 All odd primes a(n) such that for all odd primes q smaller than a(n) the order of 2 modulo a(n)q is a proper divisor of phi(a(n)q)/2. The totient function phi is given in A000010.

n	a(n)
1	17
2	31
3	41
4	43
5	73
6	89
7	97
8	109
9	113
10	127
11	137
12	151
13	157
14	193
15	223
16	229
17	233
18	241
19	251
20	257
21	277
22	281
23	283
24	307
25	313
26	331
27	337
28	353
29	397
30	401
31	409
32	431
33	433
34	439
35	449
36	457
37	499
38	521
39	569
40	571
41	577
42	593
43	601
44	617
45	631
46	641
47	643
48	673
49	683
50	691
51	727
52	733
53	739
54	761
55	769
56	809
57	811
58	857
59	881
60	911
61	919