A340482 - cp's OEIS frontend

A340482 Numbers that are the product of two not necessarily distinct odd primes pq with the property that (pq+1)/2 and (p+q)/2 are primes.

n	a(n)
1	9
2	21
3	25
4	33
5	57
6	85
7	93
8	121
9	133
10	145
11	177
12	205
13	213
14	217
15	253
16	361
17	393
18	445
19	553
20	565
21	633
22	697
23	793
24	817
25	841
26	865
27	913
28	933
29	973
30	1137
31	1285
32	1345
33	1417
34	1437
35	1465
36	1477
37	1513
38	1537
39	1717
40	1765
41	1837
42	1857
43	1893
44	2101
45	2173
46	2245
47	2305
48	2517
49	2577
50	2581
51	2605
52	2641
53	2653

[9, 21, 25, 33, 57, 85, 93, 121, 133, 145, 177, 205, 213, 217, 253, 361, 393, 445, 553, 565, 633, 697, 793, 817, 841, 865, 913, 933, 973, 1137, 1285, 1345, 1417, 1437, 1465, 1477, 1513, 1537, 1717, 1765, 1837, 1857, 1893, 2101, 2173, 2245, 2305, 2517, 2577, 2581, 2605, 2641, 2653]

cp's OEIS Frontend

A340482 Numbers that are the product of two not necessarily distinct odd primes pq with the property that (pq+1)/2 and (p+q)/2 are primes.

Table of values

List of values

cp's OEIS Frontend

A340482 Numbers that are the product of two not necessarily distinct odd primes p*q with the property that (p*q+1)/2 and (p+q)/2 are primes.

Table of values

List of values

A340482 Numbers that are the product of two not necessarily distinct odd primes pq with the property that (pq+1)/2 and (p+q)/2 are primes.