A351259 - cp's OEIS frontend

A351259 First noncomposite number reached when iterating the map x -> x', when starting from x = A351255(n). Here x' is the arithmetic derivative of x, A003415.

n	a(n)
1	1
2	2
3	3
4	5
5	5
6	7
7	5
8	7
9	31
10	7
11	41
12	71
13	191
14	2711
15	7
16	5
17	7
18	41
19	103
20	59
21	71
22	271
23	71
24	1031
25	2887
26	439
27	5
28	5
29	7
30	631
31	251
32	401
33	3491
34	1031
35	1319
36	17747
37	9733
38	1931
39	16319
40	77351
41	131
42	5
43	419
44	7079
45	22343
46	971
47	5981
48	6861581
49	419
50	18731
51	11903
52	33937
53	7079
54	15287
55	15287
56	6143
57	6944111
58	1415651
59	11
60	13
61	5
62	61
63	103
64	401
65	631

[1, 2, 3, 5, 5, 7, 5, 7, 31, 7, 41, 71, 191, 2711, 7, 5, 7, 41, 103, 59, 71, 271, 71, 1031, 2887, 439, 5, 5, 7, 631, 251, 401, 3491, 1031, 1319, 17747, 9733, 1931, 16319, 77351, 131, 5, 419, 7079, 22343, 971, 5981, 6861581, 419, 18731, 11903, 33937, 7079, 15287, 15287, 6143, 6944111, 1415651, 11, 13, 5, 61, 103, 401, 631]

cp's OEIS Frontend

A351259 First noncomposite number reached when iterating the map x -> x', when starting from x = A351255(n). Here x' is the arithmetic derivative of x, A003415.

Table of values

List of values