A086519 - cp's OEIS frontend

A086519 a(n) is the least prime not already used such that (a(n)+a(n-1))/2 is prime.

n	a(n)
0	3
1	7
2	19
3	43
4	31
5	103
6	151
7	67
8	79
9	127
10	199
11	163
12	139
13	223
14	331
15	211
16	271
17	283
18	379
19	367
20	307
21	439
22	487
23	607
24	547
25	499
26	643
27	571
28	523
29	619
30	463
31	631
32	691
33	727
34	739
35	883
36	823
37	751
38	787
39	859
40	907
41	811
42	1063
43	919
44	1123
45	1051
46	967
47	1171
48	1087
49	991
50	1471
51	1291

[3, 7, 19, 43, 31, 103, 151, 67, 79, 127, 199, 163, 139, 223, 331, 211, 271, 283, 379, 367, 307, 439, 487, 607, 547, 499, 643, 571, 523, 619, 463, 631, 691, 727, 739, 883, 823, 751, 787, 859, 907, 811, 1063, 919, 1123, 1051, 967, 1171, 1087, 991, 1471, 1291]

cp's OEIS Frontend

A086519 a(n) is the least prime not already used such that (a(n)+a(n-1))/2 is prime.

Table of values

List of values