A219252 - cp's OEIS frontend

A219252 Smallest prime q such that 2n+1 = p + 4q for some odd prime p, otherwise 0 if no such q exists.

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

[0, 0, 0, 0, 2, 2, 2, 3, 2, 2, 3, 2, 2, 3, 2, 5, 3, 2, 2, 3, 3, 2, 7, 2, 2, 3, 2, 5, 3, 2, 5, 3, 2, 2, 3, 3, 2, 0, 2, 2, 3, 3, 2, 7, 2, 5, 3, 2, 5, 3, 5, 2, 7, 2, 2, 3, 2, 2, 3, 2, 5, 3, 5, 5, 7, 5, 2, 7, 2, 7, 3, 2, 2, 3, 3, 11, 7, 2, 2, 3, 3, 2, 7, 3, 2, 19, 2, 5, 3, 2]

cp's OEIS Frontend

A219252 Smallest prime q such that 2n+1 = p + 4q for some odd prime p, otherwise 0 if no such q exists.

Table of values

List of values

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

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

cp's OEIS Frontend

A219252 Smallest prime q such that 2*n+1 = p + 4*q for some odd prime p, otherwise 0 if no such q exists.

Table of values

List of values

A219252 Smallest prime q such that 2n+1 = p + 4q for some odd prime p, otherwise 0 if no such q exists.

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