A191473 - cp's OEIS frontend

A191473 Let a(1) = 3. For n > 1, a(n) is the smallest prime p > a(n-1) such that q = (a(n-1) + p)/4 is prime.

n	a(n)
1	3
2	5
3	7
4	13
5	31
6	37
7	79
8	109
9	127
10	157
11	199
12	229
13	367
14	397
15	607
16	661
17	727
18	829
19	967
20	997
21	1039
22	1213
23	1399
24	1693
25	1759
26	1789
27	1999
28	2053
29	2143
30	2221
31	2383
32	2389
33	2503
34	3229
35	3319
36	3469
37	3823
38	4093
39	4159
40	4357
41	4591
42	4597
43	4639
44	4789
45	4903
46	4933
47	5431
48	5581

[3, 5, 7, 13, 31, 37, 79, 109, 127, 157, 199, 229, 367, 397, 607, 661, 727, 829, 967, 997, 1039, 1213, 1399, 1693, 1759, 1789, 1999, 2053, 2143, 2221, 2383, 2389, 2503, 3229, 3319, 3469, 3823, 4093, 4159, 4357, 4591, 4597, 4639, 4789, 4903, 4933, 5431, 5581]

cp's OEIS Frontend

A191473 Let a(1) = 3. For n > 1, a(n) is the smallest prime p > a(n-1) such that q = (a(n-1) + p)/4 is prime.

Table of values

List of values