A237184 - cp's OEIS frontend

A237184 Number of ordered ways to write n = (1+(n mod 2))*p + q with p, q, phi(p+1) - 1 and phi(q-1) + 1 all prime.

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

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

cp's OEIS Frontend

A237184 Number of ordered ways to write n = (1+(n mod 2))*p + q with p, q, phi(p+1) - 1 and phi(q-1) + 1 all 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	1
11	0
12	1
13	0
14	2
15	0
16	2
17	1
18	3
19	1
20	3
21	1
22	3
23	0
24	4
25	2
26	4
27	2
28	2
29	2
30	5
31	1
32	3
33	3
34	3
35	1
36	5
37	3
38	1
39	2
40	4
41	3
42	5
43	2
44	3
45	4
46	4
47	1
48	7
49	3
50	4
51	4
52	4
53	2
54	6
55	2
56	5
57	4
58	4
59	2
60	7
61	3
62	2
63	4
64	5
65	3
66	8
67	2
68	2
69	4
70	5
71	2
72	7
73	2
74	5
75	4
76	4
77	3
78	6
79	2
80	5

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

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