A382983 - cp's OEIS frontend

A382983 a(n) is the number of solutions to n = x*y in positive integers x <= y where x + y is prime.

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

[1, 1, 0, 1, 0, 2, 0, 0, 0, 2, 0, 2, 0, 0, 0, 1, 0, 2, 0, 0, 0, 2, 0, 1, 0, 0, 0, 2, 0, 4, 0, 0, 0, 1, 0, 2, 0, 0, 0, 2, 0, 4, 0, 0, 0, 1, 0, 1, 0, 0, 0, 2, 0, 1, 0, 0, 0, 2, 0, 4, 0, 0, 0, 0, 0, 2, 0, 0, 0, 4, 0, 2, 0, 0, 0, 1, 0, 4, 0, 0, 0, 2, 0, 2, 0, 0, 0, 2]

cp's OEIS Frontend

A382983 a(n) is the number of solutions to n = x*y in positive integers x <= y where x + y is prime.

Table of values

List of values

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

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

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