A236619 - cp's OEIS frontend

A236619 a(n) = |{0 < k < n: prime(m)^3 + 2m^3 and m^3 + 2prime(m)^3 are both prime with m = 3*phi(k) + phi(n-k) - 1}|, where phi(.) is Euler's totient function.

n	a(n)
1	0
2	1
3	2
4	1
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	0
37	0
38	0
39	0
40	0
41	0
42	0
43	0
44	0
45	0
46	0
47	0
48	0
49	0
50	2
51	1
52	0
53	0
54	1
55	2
56	0
57	0
58	2
59	2
60	1
61	1
62	0
63	1
64	1
65	2
66	2
67	1
68	2
69	4
70	0
71	1
72	3
73	0
74	2
75	3
76	3
77	2
78	3
79	1
80	3
81	2
82	3
83	3
84	2
85	4
86	3
87	4
88	2
89	0
90	2
91	5
92	4
93	2
94	4
95	2
96	2
97	3
98	5
99	5
100	6

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

cp's OEIS Frontend

A236619 a(n) = |{0 < k < n: prime(m)^3 + 2m^3 and m^3 + 2prime(m)^3 are both prime with m = 3*phi(k) + phi(n-k) - 1}|, where phi(.) is Euler's totient function.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	1
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	0
37	0
38	0
39	0
40	0
41	0
42	0
43	0
44	0
45	0
46	0
47	0
48	0
49	0
50	2
51	1
52	0
53	0
54	1
55	2
56	0
57	0
58	2
59	2
60	1
61	1
62	0
63	1
64	1
65	2
66	2
67	1
68	2
69	4
70	0
71	1
72	3
73	0
74	2
75	3
76	3
77	2
78	3
79	1
80	3
81	2
82	3
83	3
84	2
85	4
86	3
87	4
88	2
89	0
90	2
91	5
92	4
93	2
94	4
95	2
96	2
97	3
98	5
99	5
100	6

n	a(n)
1	0
2	1
3	2
4	1
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	0
37	0
38	0
39	0
40	0
41	0
42	0
43	0
44	0
45	0
46	0
47	0
48	0
49	0
50	2
51	1
52	0
53	0
54	1
55	2
56	0
57	0
58	2
59	2
60	1
61	1
62	0
63	1
64	1
65	2
66	2
67	1
68	2
69	4
70	0
71	1
72	3
73	0
74	2
75	3
76	3
77	2
78	3
79	1
80	3
81	2
82	3
83	3
84	2
85	4
86	3
87	4
88	2
89	0
90	2
91	5
92	4
93	2
94	4
95	2
96	2
97	3
98	5
99	5
100	6

cp's OEIS Frontend

A236619 a(n) = |{0 < k < n: prime(m)^3 + 2*m^3 and m^3 + 2*prime(m)^3 are both prime with m = 3*phi(k) + phi(n-k) - 1}|, where phi(.) is Euler's totient function.

Table of values

List of values

A236619 a(n) = |{0 < k < n: prime(m)^3 + 2m^3 and m^3 + 2prime(m)^3 are both prime with m = 3*phi(k) + phi(n-k) - 1}|, where phi(.) is Euler's totient function.

n	a(n)
1	0
2	1
3	2
4	1
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	0
37	0
38	0
39	0
40	0
41	0
42	0
43	0
44	0
45	0
46	0
47	0
48	0
49	0
50	2
51	1
52	0
53	0
54	1
55	2
56	0
57	0
58	2
59	2
60	1
61	1
62	0
63	1
64	1
65	2
66	2
67	1
68	2
69	4
70	0
71	1
72	3
73	0
74	2
75	3
76	3
77	2
78	3
79	1
80	3
81	2
82	3
83	3
84	2
85	4
86	3
87	4
88	2
89	0
90	2
91	5
92	4
93	2
94	4
95	2
96	2
97	3
98	5
99	5
100	6