A125049 - cp's OEIS frontend

A125049 a(1) = 1. If a(n) is prime, a(n+1) = 2a(n); otherwise, a(n+1) = 2a(n) + 1.

n	a(n)
1	1
2	3
3	6
4	13
5	26
6	53
7	106
8	213
9	427
10	855
11	1711
12	3423
13	6847
14	13695
15	27391
16	54783
17	109567
18	219134
19	438269
20	876539
21	1753079
22	3506159
23	7012318
24	14024637
25	28049275
26	56098551
27	112197103
28	224394207
29	448788415
30	897576831
31	1795153663
32	3590307326

[1, 3, 6, 13, 26, 53, 106, 213, 427, 855, 1711, 3423, 6847, 13695, 27391, 54783, 109567, 219134, 438269, 876539, 1753079, 3506159, 7012318, 14024637, 28049275, 56098551, 112197103, 224394207, 448788415, 897576831, 1795153663, 3590307326]

cp's OEIS Frontend

A125049 a(1) = 1. If a(n) is prime, a(n+1) = 2a(n); otherwise, a(n+1) = 2a(n) + 1.

Table of values

List of values

cp's OEIS Frontend

A125049 a(1) = 1. If a(n) is prime, a(n+1) = 2*a(n); otherwise, a(n+1) = 2*a(n) + 1.

Table of values

List of values

A125049 a(1) = 1. If a(n) is prime, a(n+1) = 2a(n); otherwise, a(n+1) = 2a(n) + 1.