A322977 - cp's OEIS frontend

A322977 Number of even divisors d of n such that d-1 is prime.

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	0
8	2
9	0
10	0
11	0
12	3
13	0
14	1
15	0
16	2
17	0
18	2
19	0
20	2
21	0
22	0
23	0
24	5
25	0
26	0
27	0
28	2
29	0
30	2
31	0
32	3
33	0
34	0
35	0
36	4
37	0
38	1
39	0
40	3
41	0
42	3
43	0
44	2
45	0
46	0
47	0
48	6
49	0
50	0
51	0
52	1
53	0
54	3
55	0
56	3
57	0
58	0
59	0
60	6
61	0
62	1
63	0
64	3
65	0
66	1
67	0
68	2
69	0
70	1
71	0
72	7
73	0
74	1
75	0
76	2
77	0
78	1
79	0
80	4
81	0
82	0
83	0
84	6
85	0
86	0
87	0
88	3
89	0
90	4
91	0
92	1
93	0
94	0
95	0
96	7
97	0
98	2
99	0
100	2
101	0
102	2
103	0
104	3
105	0

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

cp's OEIS Frontend

A322977 Number of even divisors d of n such that d-1 is prime.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	0
8	2
9	0
10	0
11	0
12	3
13	0
14	1
15	0
16	2
17	0
18	2
19	0
20	2
21	0
22	0
23	0
24	5
25	0
26	0
27	0
28	2
29	0
30	2
31	0
32	3
33	0
34	0
35	0
36	4
37	0
38	1
39	0
40	3
41	0
42	3
43	0
44	2
45	0
46	0
47	0
48	6
49	0
50	0
51	0
52	1
53	0
54	3
55	0
56	3
57	0
58	0
59	0
60	6
61	0
62	1
63	0
64	3
65	0
66	1
67	0
68	2
69	0
70	1
71	0
72	7
73	0
74	1
75	0
76	2
77	0
78	1
79	0
80	4
81	0
82	0
83	0
84	6
85	0
86	0
87	0
88	3
89	0
90	4
91	0
92	1
93	0
94	0
95	0
96	7
97	0
98	2
99	0
100	2
101	0
102	2
103	0
104	3
105	0

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	0
8	2
9	0
10	0
11	0
12	3
13	0
14	1
15	0
16	2
17	0
18	2
19	0
20	2
21	0
22	0
23	0
24	5
25	0
26	0
27	0
28	2
29	0
30	2
31	0
32	3
33	0
34	0
35	0
36	4
37	0
38	1
39	0
40	3
41	0
42	3
43	0
44	2
45	0
46	0
47	0
48	6
49	0
50	0
51	0
52	1
53	0
54	3
55	0
56	3
57	0
58	0
59	0
60	6
61	0
62	1
63	0
64	3
65	0
66	1
67	0
68	2
69	0
70	1
71	0
72	7
73	0
74	1
75	0
76	2
77	0
78	1
79	0
80	4
81	0
82	0
83	0
84	6
85	0
86	0
87	0
88	3
89	0
90	4
91	0
92	1
93	0
94	0
95	0
96	7
97	0
98	2
99	0
100	2
101	0
102	2
103	0
104	3
105	0

n	a(n)
1	0
2	0
3	0
4	1
5	0
6	1
7	0
8	2
9	0
10	0
11	0
12	3
13	0
14	1
15	0
16	2
17	0
18	2
19	0
20	2
21	0
22	0
23	0
24	5
25	0
26	0
27	0
28	2
29	0
30	2
31	0
32	3
33	0
34	0
35	0
36	4
37	0
38	1
39	0
40	3
41	0
42	3
43	0
44	2
45	0
46	0
47	0
48	6
49	0
50	0
51	0
52	1
53	0
54	3
55	0
56	3
57	0
58	0
59	0
60	6
61	0
62	1
63	0
64	3
65	0
66	1
67	0
68	2
69	0
70	1
71	0
72	7
73	0
74	1
75	0
76	2
77	0
78	1
79	0
80	4
81	0
82	0
83	0
84	6
85	0
86	0
87	0
88	3
89	0
90	4
91	0
92	1
93	0
94	0
95	0
96	7
97	0
98	2
99	0
100	2
101	0
102	2
103	0
104	3
105	0