A238605 - cp's OEIS frontend

A238605 Semiprimes n such that (n+1)/4 also is a semiprime.

n	a(n)
1	15
2	35
3	39
4	55
5	87
6	155
7	183
8	203
9	219
10	247
11	259
12	295
13	327
14	339
15	371
16	471
17	515
18	535
19	579
20	583
21	635
22	707
23	731
24	803
25	807
26	835
27	851
28	871
29	939
30	995
31	1011
32	1047
33	1059
34	1067
35	1111
36	1147
37	1191
38	1195
39	1203
40	1207
41	1211
42	1219
43	1255
44	1315
45	1339
46	1355
47	1363
48	1383
49	1507
50	1527
51	1563
52	1591
53	1643
54	1651
55	1687
56	1707

[15, 35, 39, 55, 87, 155, 183, 203, 219, 247, 259, 295, 327, 339, 371, 471, 515, 535, 579, 583, 635, 707, 731, 803, 807, 835, 851, 871, 939, 995, 1011, 1047, 1059, 1067, 1111, 1147, 1191, 1195, 1203, 1207, 1211, 1219, 1255, 1315, 1339, 1355, 1363, 1383, 1507, 1527, 1563, 1591, 1643, 1651, 1687, 1707]

cp's OEIS Frontend

A238605 Semiprimes n such that (n+1)/4 also is a semiprime.

Table of values

List of values