A083005 - cp's OEIS frontend

A083005 a(1)=1, a(n)=2a(n-1)+1 if a(n-1) is prime, a(n)=a(n-1)+1 otherwise.

n	a(n)
1	1
2	2
3	5
4	11
5	23
6	47
7	95
8	96
9	97
10	195
11	196
12	197
13	395
14	396
15	397
16	795
17	796
18	797
19	1595
20	1596
21	1597
22	3195
23	3196
24	3197
25	3198
26	3199
27	3200
28	3201
29	3202
30	3203
31	6407
32	6408
33	6409
34	6410
35	6411
36	6412
37	6413
38	6414
39	6415
40	6416
41	6417
42	6418
43	6419
44	6420
45	6421
46	12843
47	12844

[1, 2, 5, 11, 23, 47, 95, 96, 97, 195, 196, 197, 395, 396, 397, 795, 796, 797, 1595, 1596, 1597, 3195, 3196, 3197, 3198, 3199, 3200, 3201, 3202, 3203, 6407, 6408, 6409, 6410, 6411, 6412, 6413, 6414, 6415, 6416, 6417, 6418, 6419, 6420, 6421, 12843, 12844]

cp's OEIS Frontend

A083005 a(1)=1, a(n)=2a(n-1)+1 if a(n-1) is prime, a(n)=a(n-1)+1 otherwise.

Table of values

List of values