A285813 - cp's OEIS frontend

A285813 Let p_1 be primes such that 2n-p_i is prime. a(n) is the smallest i such that 2n+(odd part of p_i-1) is prime or a(n)=0 if there is no such i.

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

[0, 1, 1, 0, 1, 1, 2, 1, 1, 2, 1, 3, 2, 1, 4, 3, 6, 1, 1, 1, 1, 2, 1, 3, 2, 1, 2, 2, 1, 3, 2, 10, 1, 1, 1, 1, 4, 5, 1, 1, 1, 2, 2, 1, 5, 3, 6, 3, 1, 1, 1, 2, 1, 1, 2, 1, 9, 6, 0, 6, 2, 5, 2, 1, 1, 4, 2, 1, 7, 4, 4, 7, 1, 2, 8, 3, 7, 1, 2, 4, 1, 1, 1, 2, 2, 1]

cp's OEIS Frontend

A285813 Let p_1 be primes such that 2n-p_i is prime. a(n) is the smallest i such that 2n+(odd part of p_i-1) is prime or a(n)=0 if there is no such i.

Table of values

List of values

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

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

cp's OEIS Frontend

A285813 Let p_1 be primes such that 2*n-p_i is prime. a(n) is the smallest i such that 2*n+(odd part of p_i-1) is prime or a(n)=0 if there is no such i.

Table of values

List of values

A285813 Let p_1 be primes such that 2n-p_i is prime. a(n) is the smallest i such that 2n+(odd part of p_i-1) is prime or a(n)=0 if there is no such i.

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