A358049 - cp's OEIS frontend

A358049 a(1) = 2, a(2) = 3; afterwards a(n) is least new prime > a(n-1) such that a(n-2) + a(n) and a(n-1) + a(n) are semiprimes.

n	a(n)
1	2
2	3
3	7
4	19
5	67
6	127
7	151
8	271
9	463
10	823
11	883
12	991
13	1051
14	1087
15	2011
16	2251
17	2311
18	2371
19	2383
20	2731
21	2803
22	2971
23	3271
24	3391
25	3643
26	3823
27	4111
28	4483
29	6343
30	6379
31	6763
32	7879
33	8443
34	9199
35	9283
36	9643
37	10159
38	10639
39	10867
40	10939
41	11047
42	11299
43	11467
44	11587
45	11971
46	12511
47	12583
48	14071

[2, 3, 7, 19, 67, 127, 151, 271, 463, 823, 883, 991, 1051, 1087, 2011, 2251, 2311, 2371, 2383, 2731, 2803, 2971, 3271, 3391, 3643, 3823, 4111, 4483, 6343, 6379, 6763, 7879, 8443, 9199, 9283, 9643, 10159, 10639, 10867, 10939, 11047, 11299, 11467, 11587, 11971, 12511, 12583, 14071]

cp's OEIS Frontend

A358049 a(1) = 2, a(2) = 3; afterwards a(n) is least new prime > a(n-1) such that a(n-2) + a(n) and a(n-1) + a(n) are semiprimes.

Table of values

List of values