A279047 - cp's OEIS frontend

A279047 Number k of modular reductions at which the recurrence relation x(i+1) = x(0) mod x(i) terminates with x(k) = 1, where x(0) = prime(n+1), x(1) = prime(n).

n	a(n)
1	1
2	2
3	2
4	4
5	2
6	2
7	2
8	4
9	4
10	2
11	2
12	2
13	2
14	4
15	5
16	6
17	2
18	2
19	4
20	2
21	2
22	4
23	4
24	2
25	2
26	2
27	4
28	2
29	2
30	2
31	4
32	4
33	2
34	5
35	2
36	2
37	2
38	4
39	5
40	6
41	2
42	2
43	2
44	2
45	2
46	3
47	4
48	4
49	2
50	2
51	6
52	2
53	2
54	4
55	5
56	4
57	2
58	2
59	2
60	2
61	4
62	5
63	4
64	2
65	2
66	5
67	2
68	6
69	2
70	2
71	6
72	4
73	2
74	2
75	4
76	4
77	4
78	2
79	2
80	7
81	2
82	2
83	2
84	2
85	4
86	4
87	2
88	2
89	2
90	4
91	8
92	5
93	4
94	3
95	4
96	4
97	3
98	2
99	2
100	2
101	4
102	5
103	4
104	2
105	2
106	6
107	5
108	6

[1, 2, 2, 4, 2, 2, 2, 4, 4, 2, 2, 2, 2, 4, 5, 6, 2, 2, 4, 2, 2, 4, 4, 2, 2, 2, 4, 2, 2, 2, 4, 4, 2, 5, 2, 2, 2, 4, 5, 6, 2, 2, 2, 2, 2, 3, 4, 4, 2, 2, 6, 2, 2, 4, 5, 4, 2, 2, 2, 2, 4, 5, 4, 2, 2, 5, 2, 6, 2, 2, 6, 4, 2, 2, 4, 4, 4, 2, 2, 7, 2, 2, 2, 2, 4, 4, 2, 2, 2, 4, 8, 5, 4, 3, 4, 4, 3, 2, 2, 2, 4, 5, 4, 2, 2, 6, 5, 6]

cp's OEIS Frontend

A279047 Number k of modular reductions at which the recurrence relation x(i+1) = x(0) mod x(i) terminates with x(k) = 1, where x(0) = prime(n+1), x(1) = prime(n).

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	4
5	2
6	2
7	2
8	4
9	4
10	2
11	2
12	2
13	2
14	4
15	5
16	6
17	2
18	2
19	4
20	2
21	2
22	4
23	4
24	2
25	2
26	2
27	4
28	2
29	2
30	2
31	4
32	4
33	2
34	5
35	2
36	2
37	2
38	4
39	5
40	6
41	2
42	2
43	2
44	2
45	2
46	3
47	4
48	4
49	2
50	2
51	6
52	2
53	2
54	4
55	5
56	4
57	2
58	2
59	2
60	2
61	4
62	5
63	4
64	2
65	2
66	5
67	2
68	6
69	2
70	2
71	6
72	4
73	2
74	2
75	4
76	4
77	4
78	2
79	2
80	7
81	2
82	2
83	2
84	2
85	4
86	4
87	2
88	2
89	2
90	4
91	8
92	5
93	4
94	3
95	4
96	4
97	3
98	2
99	2
100	2
101	4
102	5
103	4
104	2
105	2
106	6
107	5
108	6

n	a(n)
1	1
2	2
3	2
4	4
5	2
6	2
7	2
8	4
9	4
10	2
11	2
12	2
13	2
14	4
15	5
16	6
17	2
18	2
19	4
20	2
21	2
22	4
23	4
24	2
25	2
26	2
27	4
28	2
29	2
30	2
31	4
32	4
33	2
34	5
35	2
36	2
37	2
38	4
39	5
40	6
41	2
42	2
43	2
44	2
45	2
46	3
47	4
48	4
49	2
50	2
51	6
52	2
53	2
54	4
55	5
56	4
57	2
58	2
59	2
60	2
61	4
62	5
63	4
64	2
65	2
66	5
67	2
68	6
69	2
70	2
71	6
72	4
73	2
74	2
75	4
76	4
77	4
78	2
79	2
80	7
81	2
82	2
83	2
84	2
85	4
86	4
87	2
88	2
89	2
90	4
91	8
92	5
93	4
94	3
95	4
96	4
97	3
98	2
99	2
100	2
101	4
102	5
103	4
104	2
105	2
106	6
107	5
108	6

n	a(n)
1	1
2	2
3	2
4	4
5	2
6	2
7	2
8	4
9	4
10	2
11	2
12	2
13	2
14	4
15	5
16	6
17	2
18	2
19	4
20	2
21	2
22	4
23	4
24	2
25	2
26	2
27	4
28	2
29	2
30	2
31	4
32	4
33	2
34	5
35	2
36	2
37	2
38	4
39	5
40	6
41	2
42	2
43	2
44	2
45	2
46	3
47	4
48	4
49	2
50	2
51	6
52	2
53	2
54	4
55	5
56	4
57	2
58	2
59	2
60	2
61	4
62	5
63	4
64	2
65	2
66	5
67	2
68	6
69	2
70	2
71	6
72	4
73	2
74	2
75	4
76	4
77	4
78	2
79	2
80	7
81	2
82	2
83	2
84	2
85	4
86	4
87	2
88	2
89	2
90	4
91	8
92	5
93	4
94	3
95	4
96	4
97	3
98	2
99	2
100	2
101	4
102	5
103	4
104	2
105	2
106	6
107	5
108	6