A084199 - cp's OEIS frontend

A084199 Smallest prime q < prime(n) such that q+1 divides prime(n)+1, a(n) = 1 if no such q exists.

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

[1, 1, 2, 3, 2, 1, 2, 3, 2, 2, 3, 1, 2, 3, 2, 2, 2, 1, 3, 2, 1, 3, 2, 2, 13, 2, 3, 2, 1, 2, 3, 2, 2, 3, 2, 3, 1, 3, 2, 2, 2, 13, 2, 1, 2, 3, 3, 3, 2, 1, 2, 2, 1, 2, 2, 2, 2, 3, 1, 2, 3, 2, 3, 2, 1, 2, 3, 1, 2, 13, 2, 2, 3, 1, 3, 2, 2, 1, 2, 1, 2, 1, 2, 13, 3, 2, 2, 1, 2, 3, 2, 2, 3, 2, 3, 2, 2, 2, 3, 1, 3, 2, 2]

cp's OEIS Frontend

A084199 Smallest prime q < prime(n) such that q+1 divides prime(n)+1, a(n) = 1 if no such q exists.

Table of values

List of values

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

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

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