A100380 - cp's OEIS frontend

A100380 a(n) = least k such that prime(n) + A002110(k) is prime.

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	1
8	4
9	2
10	1
11	2
12	2
13	1
14	3
15	2
16	2
17	1
18	2
19	2
20	1
21	2
22	3
23	2
24	5
25	2
26	1
27	2
28	1
29	3
30	5
31	3
32	2
33	1
34	4
35	1
36	2
37	2
38	3
39	2
40	2
41	1
42	3
43	1
44	2
45	1
46	3
47	3
48	2
49	1
50	4
51	2
52	1
53	3
54	2
55	2
56	2
57	1
58	2
59	2
60	1
61	3
62	4
63	2
64	1
65	4
66	3
67	2
68	3
69	1
70	3
71	2
72	3
73	2
74	2
75	3
76	2
77	3
78	4
79	3
80	3
81	1
82	4
83	1
84	2
85	5
86	2
87	3
88	2
89	1
90	4
91	4
92	3
93	5
94	3
95	4
96	2
97	4
98	1
99	4
100	2

[0, 1, 1, 2, 1, 2, 1, 4, 2, 1, 2, 2, 1, 3, 2, 2, 1, 2, 2, 1, 2, 3, 2, 5, 2, 1, 2, 1, 3, 5, 3, 2, 1, 4, 1, 2, 2, 3, 2, 2, 1, 3, 1, 2, 1, 3, 3, 2, 1, 4, 2, 1, 3, 2, 2, 2, 1, 2, 2, 1, 3, 4, 2, 1, 4, 3, 2, 3, 1, 3, 2, 3, 2, 2, 3, 2, 3, 4, 3, 3, 1, 4, 1, 2, 5, 2, 3, 2, 1, 4, 4, 3, 5, 3, 4, 2, 4, 1, 4, 2]

cp's OEIS Frontend

A100380 a(n) = least k such that prime(n) + A002110(k) is prime.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	1
8	4
9	2
10	1
11	2
12	2
13	1
14	3
15	2
16	2
17	1
18	2
19	2
20	1
21	2
22	3
23	2
24	5
25	2
26	1
27	2
28	1
29	3
30	5
31	3
32	2
33	1
34	4
35	1
36	2
37	2
38	3
39	2
40	2
41	1
42	3
43	1
44	2
45	1
46	3
47	3
48	2
49	1
50	4
51	2
52	1
53	3
54	2
55	2
56	2
57	1
58	2
59	2
60	1
61	3
62	4
63	2
64	1
65	4
66	3
67	2
68	3
69	1
70	3
71	2
72	3
73	2
74	2
75	3
76	2
77	3
78	4
79	3
80	3
81	1
82	4
83	1
84	2
85	5
86	2
87	3
88	2
89	1
90	4
91	4
92	3
93	5
94	3
95	4
96	2
97	4
98	1
99	4
100	2

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	1
8	4
9	2
10	1
11	2
12	2
13	1
14	3
15	2
16	2
17	1
18	2
19	2
20	1
21	2
22	3
23	2
24	5
25	2
26	1
27	2
28	1
29	3
30	5
31	3
32	2
33	1
34	4
35	1
36	2
37	2
38	3
39	2
40	2
41	1
42	3
43	1
44	2
45	1
46	3
47	3
48	2
49	1
50	4
51	2
52	1
53	3
54	2
55	2
56	2
57	1
58	2
59	2
60	1
61	3
62	4
63	2
64	1
65	4
66	3
67	2
68	3
69	1
70	3
71	2
72	3
73	2
74	2
75	3
76	2
77	3
78	4
79	3
80	3
81	1
82	4
83	1
84	2
85	5
86	2
87	3
88	2
89	1
90	4
91	4
92	3
93	5
94	3
95	4
96	2
97	4
98	1
99	4
100	2

n	a(n)
1	0
2	1
3	1
4	2
5	1
6	2
7	1
8	4
9	2
10	1
11	2
12	2
13	1
14	3
15	2
16	2
17	1
18	2
19	2
20	1
21	2
22	3
23	2
24	5
25	2
26	1
27	2
28	1
29	3
30	5
31	3
32	2
33	1
34	4
35	1
36	2
37	2
38	3
39	2
40	2
41	1
42	3
43	1
44	2
45	1
46	3
47	3
48	2
49	1
50	4
51	2
52	1
53	3
54	2
55	2
56	2
57	1
58	2
59	2
60	1
61	3
62	4
63	2
64	1
65	4
66	3
67	2
68	3
69	1
70	3
71	2
72	3
73	2
74	2
75	3
76	2
77	3
78	4
79	3
80	3
81	1
82	4
83	1
84	2
85	5
86	2
87	3
88	2
89	1
90	4
91	4
92	3
93	5
94	3
95	4
96	2
97	4
98	1
99	4
100	2