A358166 - cp's OEIS frontend

A358166 a(1) = 13; for n > 1, if a(n-1) is even, then a(n) = a(n-1)/2; otherwise, a(n) = a(n-1) + prime(a(n-1)).

n	a(n)
1	13
2	54
3	27
4	130
5	65
6	378
7	189
8	1318
9	659
10	5592
11	2796
12	1398
13	699
14	5972
15	2986
16	1493
17	13996
18	6998
19	3499
20	36102
21	18051
22	218932
23	109466
24	54733
25	730334
26	365167
27	5622764
28	2811382
29	1405691
30	23685544
31	11842772
32	5921386
33	2960693
34	52246474
35	26123237
36	521463688
37	260731844
38	130365922
39	65182961
40	1364229390

[13, 54, 27, 130, 65, 378, 189, 1318, 659, 5592, 2796, 1398, 699, 5972, 2986, 1493, 13996, 6998, 3499, 36102, 18051, 218932, 109466, 54733, 730334, 365167, 5622764, 2811382, 1405691, 23685544, 11842772, 5921386, 2960693, 52246474, 26123237, 521463688, 260731844, 130365922, 65182961, 1364229390]

cp's OEIS Frontend

A358166 a(1) = 13; for n > 1, if a(n-1) is even, then a(n) = a(n-1)/2; otherwise, a(n) = a(n-1) + prime(a(n-1)).

Table of values

List of values