A270361 - cp's OEIS frontend

A270361 Odd primes p for which there exists an odd prime q < p such that p*q - 1 is a square.

n	a(n)
1	13
2	29
3	53
4	61
5	73
6	89
7	97
8	109
9	137
10	149
11	157
12	173
13	233
14	241
15	277
16	317
17	349
18	353
19	373
20	389
21	397
22	409
23	433
24	461
25	521
26	541
27	569
28	593
29	617
30	641
31	653
32	661
33	673
34	701
35	709
36	733
37	757
38	769
39	773
40	821
41	829
42	853
43	877
44	881
45	929
46	937

[13, 29, 53, 61, 73, 89, 97, 109, 137, 149, 157, 173, 233, 241, 277, 317, 349, 353, 373, 389, 397, 409, 433, 461, 521, 541, 569, 593, 617, 641, 653, 661, 673, 701, 709, 733, 757, 769, 773, 821, 829, 853, 877, 881, 929, 937]

cp's OEIS Frontend

A270361 Odd primes p for which there exists an odd prime q < p such that p*q - 1 is a square.

Table of values

List of values

n	a(n)
1	13
2	29
3	53
4	61
5	73
6	89
7	97
8	109
9	137
10	149
11	157
12	173
13	233
14	241
15	277
16	317
17	349
18	353
19	373
20	389
21	397
22	409
23	433
24	461
25	521
26	541
27	569
28	593
29	617
30	641
31	653
32	661
33	673
34	701
35	709
36	733
37	757
38	769
39	773
40	821
41	829
42	853
43	877
44	881
45	929
46	937

n	a(n)
1	13
2	29
3	53
4	61
5	73
6	89
7	97
8	109
9	137
10	149
11	157
12	173
13	233
14	241
15	277
16	317
17	349
18	353
19	373
20	389
21	397
22	409
23	433
24	461
25	521
26	541
27	569
28	593
29	617
30	641
31	653
32	661
33	673
34	701
35	709
36	733
37	757
38	769
39	773
40	821
41	829
42	853
43	877
44	881
45	929
46	937

n	a(n)
1	13
2	29
3	53
4	61
5	73
6	89
7	97
8	109
9	137
10	149
11	157
12	173
13	233
14	241
15	277
16	317
17	349
18	353
19	373
20	389
21	397
22	409
23	433
24	461
25	521
26	541
27	569
28	593
29	617
30	641
31	653
32	661
33	673
34	701
35	709
36	733
37	757
38	769
39	773
40	821
41	829
42	853
43	877
44	881
45	929
46	937