A259630 - cp's OEIS frontend

A259630 a(n) is the smallest integer not occurring earlier such that 2^a(1) + 2^a(2) + ... + 2^a(n) is a prime.

n	a(n)
1	1
2	0
3	2
4	4
5	3
6	12
7	5
8	14
9	27
10	8
11	25
12	30
13	31
14	36
15	13
16	18
17	131
18	60
19	133
20	458
21	247
22	1040
23	21
24	618
25	283
26	300
27	209
28	6282
29	19107
30	11792
31	3401
32	30214
33	1211
34	3044
35	15989
36	30194

[1, 0, 2, 4, 3, 12, 5, 14, 27, 8, 25, 30, 31, 36, 13, 18, 131, 60, 133, 458, 247, 1040, 21, 618, 283, 300, 209, 6282, 19107, 11792, 3401, 30214, 1211, 3044, 15989, 30194]

cp's OEIS Frontend

A259630 a(n) is the smallest integer not occurring earlier such that 2^a(1) + 2^a(2) + ... + 2^a(n) is a prime.

Table of values

List of values