A282849 - cp's OEIS frontend

A282849 Number of divisors k of n such that (n + k^2)/k is a prime.

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

[1, 2, 0, 2, 0, 4, 0, 0, 0, 4, 0, 4, 0, 0, 0, 2, 0, 4, 0, 0, 0, 4, 0, 2, 0, 0, 0, 4, 0, 8, 0, 0, 0, 2, 0, 4, 0, 0, 0, 4, 0, 8, 0, 0, 0, 2, 0, 2, 0, 0, 0, 4, 0, 2, 0, 0, 0, 4, 0, 8, 0, 0, 0, 0, 0, 4, 0, 0, 0, 8, 0, 4, 0, 0, 0, 2, 0, 8, 0, 0, 0, 4, 0, 4, 0, 0, 0, 4, 0, 6]

cp's OEIS Frontend

A282849 Number of divisors k of n such that (n + k^2)/k is a prime.

Table of values

List of values

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

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

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