A236417 - cp's OEIS frontend

A236417 a(n) = |{0 < k < n: p = phi(k)/2 + phi(n-k)/12 + 1 and A047967(p) are both prime}|.

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

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

cp's OEIS Frontend

A236417 a(n) = |{0 < k < n: p = phi(k)/2 + phi(n-k)/12 + 1 and A047967(p) are both prime}|.

Table of values

List of values

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

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

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