A141274 - cp's OEIS frontend

A141274 Composite numbers k such that k+1 is prime and the index in the composites is also prime.

n	a(n)
1	12
2	28
3	36
4	60
5	100
6	130
7	138
8	150
9	172
10	180
11	198
12	222
13	270
14	292
15	348
16	396
17	420
18	432
19	456
20	520
21	540
22	568
23	612
24	618
25	640
26	682
27	732
28	768
29	786
30	820
31	838
32	880
33	928
34	996
35	1032
36	1060
37	1068
38	1090
39	1096
40	1212
41	1222
42	1276
43	1300
44	1306
45	1320
46	1372
47	1428
48	1486
49	1548

[12, 28, 36, 60, 100, 130, 138, 150, 172, 180, 198, 222, 270, 292, 348, 396, 420, 432, 456, 520, 540, 568, 612, 618, 640, 682, 732, 768, 786, 820, 838, 880, 928, 996, 1032, 1060, 1068, 1090, 1096, 1212, 1222, 1276, 1300, 1306, 1320, 1372, 1428, 1486, 1548]

cp's OEIS Frontend

A141274 Composite numbers k such that k+1 is prime and the index in the composites is also prime.

Table of values

List of values