A057691 - cp's OEIS frontend

A057691 Number of terms before entering cycle in trajectory of P under the 'Px+1' map, where P = n-th prime, or -1 if trajectory does not cycle.

n	a(n)
2	5
3	13
4	4
5	10
6	25
7	11
8	68
9	14
10	39
11	34
12	9
13	4
14	5
15	5
16	16
17	16
18	234
19	23
20	16
21	5
22	11
23	5
24	63
25	116
26	18
27	18
28	33
29	288
30	47
31	29
32	317
33	14
34	12
35	61
36	60
37	6
38	16
39	10
40	5
41	14
42	46
43	5
44	6
45	15
46	105
47	4
48	11
49	48
50	44
51	5
52	6
53	10
54	5
55	55
56	15
57	14
58	25
59	17
60	9
61	16
62	6
63	7
64	26
65	5
66	33
67	46
68	5
69	16
70	23
71	13
72	15
73	11
74	16
75	14
76	11

[5, 13, 4, 10, 25, 11, 68, 14, 39, 34, 9, 4, 5, 5, 16, 16, 234, 23, 16, 5, 11, 5, 63, 116, 18, 18, 33, 288, 47, 29, 317, 14, 12, 61, 60, 6, 16, 10, 5, 14, 46, 5, 6, 15, 105, 4, 11, 48, 44, 5, 6, 10, 5, 55, 15, 14, 25, 17, 9, 16, 6, 7, 26, 5, 33, 46, 5, 16, 23, 13, 15, 11, 16, 14, 11]

cp's OEIS Frontend

A057691 Number of terms before entering cycle in trajectory of P under the 'Px+1' map, where P = n-th prime, or -1 if trajectory does not cycle.

Table of values

List of values

n	a(n)
2	5
3	13
4	4
5	10
6	25
7	11
8	68
9	14
10	39
11	34
12	9
13	4
14	5
15	5
16	16
17	16
18	234
19	23
20	16
21	5
22	11
23	5
24	63
25	116
26	18
27	18
28	33
29	288
30	47
31	29
32	317
33	14
34	12
35	61
36	60
37	6
38	16
39	10
40	5
41	14
42	46
43	5
44	6
45	15
46	105
47	4
48	11
49	48
50	44
51	5
52	6
53	10
54	5
55	55
56	15
57	14
58	25
59	17
60	9
61	16
62	6
63	7
64	26
65	5
66	33
67	46
68	5
69	16
70	23
71	13
72	15
73	11
74	16
75	14
76	11

n	a(n)
2	5
3	13
4	4
5	10
6	25
7	11
8	68
9	14
10	39
11	34
12	9
13	4
14	5
15	5
16	16
17	16
18	234
19	23
20	16
21	5
22	11
23	5
24	63
25	116
26	18
27	18
28	33
29	288
30	47
31	29
32	317
33	14
34	12
35	61
36	60
37	6
38	16
39	10
40	5
41	14
42	46
43	5
44	6
45	15
46	105
47	4
48	11
49	48
50	44
51	5
52	6
53	10
54	5
55	55
56	15
57	14
58	25
59	17
60	9
61	16
62	6
63	7
64	26
65	5
66	33
67	46
68	5
69	16
70	23
71	13
72	15
73	11
74	16
75	14
76	11

n	a(n)
2	5
3	13
4	4
5	10
6	25
7	11
8	68
9	14
10	39
11	34
12	9
13	4
14	5
15	5
16	16
17	16
18	234
19	23
20	16
21	5
22	11
23	5
24	63
25	116
26	18
27	18
28	33
29	288
30	47
31	29
32	317
33	14
34	12
35	61
36	60
37	6
38	16
39	10
40	5
41	14
42	46
43	5
44	6
45	15
46	105
47	4
48	11
49	48
50	44
51	5
52	6
53	10
54	5
55	55
56	15
57	14
58	25
59	17
60	9
61	16
62	6
63	7
64	26
65	5
66	33
67	46
68	5
69	16
70	23
71	13
72	15
73	11
74	16
75	14
76	11