A176658 - cp's OEIS frontend

A176658 Numbers k such that semiprime(semiprime(k)) + 1 = semiprime(semiprime(k+1)).

n	a(n)
1	3
2	5
3	11
4	14
5	20
6	32
7	52
8	57
9	70
10	72
11	81
12	95
13	114
14	124
15	231
16	240
17	273
18	276
19	287
20	291
21	371
22	380
23	441
24	507
25	528
26	544
27	573
28	607
29	629
30	647
31	672
32	695
33	716
34	739
35	828
36	830
37	832
38	873
39	1002
40	1035
41	1037
42	1044
43	1100
44	1104
45	1182
46	1208
47	1236
48	1278
49	1321
50	1340
51	1367
52	1522

[3, 5, 11, 14, 20, 32, 52, 57, 70, 72, 81, 95, 114, 124, 231, 240, 273, 276, 287, 291, 371, 380, 441, 507, 528, 544, 573, 607, 629, 647, 672, 695, 716, 739, 828, 830, 832, 873, 1002, 1035, 1037, 1044, 1100, 1104, 1182, 1208, 1236, 1278, 1321, 1340, 1367, 1522]

cp's OEIS Frontend

A176658 Numbers k such that semiprime(semiprime(k)) + 1 = semiprime(semiprime(k+1)).

Table of values

List of values