A367496 - cp's OEIS frontend

A367496 Semiprimes k such that 2k - 1 and 2k + 1 are also semiprimes.

n	a(n)
1	25
2	46
3	93
4	118
5	133
6	145
7	161
8	206
9	226
10	235
11	259
12	267
13	291
14	295
15	334
16	335
17	361
18	377
19	395
20	407
21	447
22	497
23	529
24	573
25	579
26	583
27	669
28	674
29	685
30	694
31	695
32	781
33	843
34	898
35	899
36	921
37	926
38	961
39	979
40	1059
41	1079
42	1114
43	1115
44	1142
45	1159
46	1214
47	1227
48	1241
49	1257
50	1285
51	1286
52	1294
53	1315
54	1379
55	1393
56	1405

[25, 46, 93, 118, 133, 145, 161, 206, 226, 235, 259, 267, 291, 295, 334, 335, 361, 377, 395, 407, 447, 497, 529, 573, 579, 583, 669, 674, 685, 694, 695, 781, 843, 898, 899, 921, 926, 961, 979, 1059, 1079, 1114, 1115, 1142, 1159, 1214, 1227, 1241, 1257, 1285, 1286, 1294, 1315, 1379, 1393, 1405]

cp's OEIS Frontend

A367496 Semiprimes k such that 2k - 1 and 2k + 1 are also semiprimes.

Table of values

List of values

cp's OEIS Frontend

A367496 Semiprimes k such that 2*k - 1 and 2*k + 1 are also semiprimes.

Table of values

List of values

A367496 Semiprimes k such that 2k - 1 and 2k + 1 are also semiprimes.