A236074 - cp's OEIS frontend

A236074 a(n) = |{0 < k < n: p = phi(k) + phi(n-k)/6 + 1, prime(2p) - 2prime(p) and prime(p) - 2*prime((p-1)/2) are all prime}|, where phi(.) is Euler's totient function.

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

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

cp's OEIS Frontend

A236074 a(n) = |{0 < k < n: p = phi(k) + phi(n-k)/6 + 1, prime(2p) - 2prime(p) and prime(p) - 2*prime((p-1)/2) are all prime}|, where phi(.) is Euler's totient function.

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

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

cp's OEIS Frontend

A236074 a(n) = |{0 < k < n: p = phi(k) + phi(n-k)/6 + 1, prime(2*p) - 2*prime(p) and prime(p) - 2*prime((p-1)/2) are all prime}|, where phi(.) is Euler's totient function.

Table of values

List of values

A236074 a(n) = |{0 < k < n: p = phi(k) + phi(n-k)/6 + 1, prime(2p) - 2prime(p) and prime(p) - 2*prime((p-1)/2) are all prime}|, where phi(.) is Euler's totient function.

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