A103828 - cp's OEIS frontend

A103828 Sequence of odd numbers defined recursively by: a(1)=1 and a(n) is the first odd number greater than a(n-1) such that a(n) + a(i) + 1 is prime for 1<=i<=n-1.

n	a(n)
1	1
2	3
3	9
4	27
5	69
6	429
7	1059
8	56499
9	166839
10	5020059
11	7681809
12	274343589
13	8316187179
14	2866819175649
15	7180244842749
16	216549352241349
17	22129340663539629
18	2504509324460255499

[1, 3, 9, 27, 69, 429, 1059, 56499, 166839, 5020059, 7681809, 274343589, 8316187179, 2866819175649, 7180244842749, 216549352241349, 22129340663539629, 2504509324460255499]

cp's OEIS Frontend

A103828 Sequence of odd numbers defined recursively by: a(1)=1 and a(n) is the first odd number greater than a(n-1) such that a(n) + a(i) + 1 is prime for 1<=i<=n-1.

Table of values

List of values