A302826 - cp's OEIS frontend

A302826 a(n) is number of primes of form k^2 + n - k for 0 < k < n.

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

[1, 2, 0, 4, 0, 4, 0, 2, 0, 10, 0, 4, 0, 3, 0, 16, 0, 6, 0, 5, 0, 10, 0, 10, 0, 5, 0, 13, 0, 14, 0, 3, 0, 10, 0, 16, 0, 7, 0, 40, 0, 8, 0, 6, 0, 26, 0, 12, 0, 9, 0, 19, 0, 14, 0, 9, 0, 34, 0, 21, 0, 5, 0, 19, 0, 36, 0, 13, 0, 28, 0, 18, 0, 7, 0, 31, 0, 18, 0, 19, 0, 34, 0, 15]

cp's OEIS Frontend

A302826 a(n) is number of primes of form k^2 + n - k for 0 < k < n.

Table of values

List of values

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

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

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