A294657 - cp's OEIS frontend

A294657 Largest number in the orbit of n under iteration of the map A125256: x -> smallest odd prime divisor of n^2+1.

n	a(n)
2	13
3	13
4	17
5	13
6	37
7	13
8	13
9	421
10	5101
11	1861
12	13
13	13
14	197
15	113
16	257
17	17
18	18
19	16381
20	401
21	21
22	22
23	23
24	577
25	313
26	677
27	27
28	28
29	421
30	30
31	31
32	32
33	33
34	34
35	613
36	1297
37	37
38	38
39	761
40	1601
41	421
42	42
43	43
44	44
45	1013
46	421
47	47
48	48
49	1201
50	421
51	1301
52	52
53	53
54	2917
55	55
56	3137
57	57
58	58
59	1515541
60	60

[13, 13, 17, 13, 37, 13, 13, 421, 5101, 1861, 13, 13, 197, 113, 257, 17, 18, 16381, 401, 21, 22, 23, 577, 313, 677, 27, 28, 421, 30, 31, 32, 33, 34, 613, 1297, 37, 38, 761, 1601, 421, 42, 43, 44, 1013, 421, 47, 48, 1201, 421, 1301, 52, 53, 2917, 55, 3137, 57, 58, 1515541, 60]

cp's OEIS Frontend

A294657 Largest number in the orbit of n under iteration of the map A125256: x -> smallest odd prime divisor of n^2+1.

Table of values

List of values