A358269 - cp's OEIS frontend

A358269 a(n) is the position m of the last prime term in the sequence {b(m)} defined by b(1) = n, if b(m) is prime then b(m+1) = b(m) - m, else b(m+1) = b(m) + m.

n	a(n)
0	3
1	1004
2	3
3	1004
4	3
5	1004
6	30
7	349
8	30
9	5
10	19
11	5
12	30
13	1004
14	30
15	8
16	11
17	8
18	30
19	5
20	86
21	17
22	67
23	17
24	15
25	9
26	19
27	9
28	15
29	9
30	19
31	484
32	19
33	13
34	30
35	9
36	19
37	9
38	19
39	13
40	374
41	13
42	19
43	13
44	11
45	484
46	86
47	484
48	19
49	13
50	67
51	16
52	19
53	16
54	19
55	484
56	374
57	484
58	19
59	484
60	374
61	24
62	19
63	13

[3, 1004, 3, 1004, 3, 1004, 30, 349, 30, 5, 19, 5, 30, 1004, 30, 8, 11, 8, 30, 5, 86, 17, 67, 17, 15, 9, 19, 9, 15, 9, 19, 484, 19, 13, 30, 9, 19, 9, 19, 13, 374, 13, 19, 13, 11, 484, 86, 484, 19, 13, 67, 16, 19, 16, 19, 484, 374, 484, 19, 484, 374, 24, 19, 13]

cp's OEIS Frontend

A358269 a(n) is the position m of the last prime term in the sequence {b(m)} defined by b(1) = n, if b(m) is prime then b(m+1) = b(m) - m, else b(m+1) = b(m) + m.

Table of values

List of values