A231635 - cp's OEIS frontend

A231635 Number of ways to write n = x + y with 0 < x <= y such that lcm(x, y) + 1 is prime.

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

[0, 1, 1, 1, 2, 1, 3, 2, 1, 1, 4, 2, 6, 1, 3, 2, 8, 4, 5, 4, 3, 2, 7, 5, 6, 2, 3, 2, 8, 5, 10, 6, 3, 1, 8, 3, 9, 4, 4, 4, 14, 6, 16, 7, 7, 2, 12, 6, 8, 4, 5, 5, 21, 5, 8, 6, 4, 8, 11, 7, 12, 5, 6, 4, 10, 8, 22, 6, 10, 6, 17, 9, 23, 7, 11, 12, 18, 10, 19, 10, 10, 7, 23, 8, 15, 4, 7, 8, 14, 11, 19, 9, 2, 4, 11, 10, 35, 6, 10, 10]

cp's OEIS Frontend

A231635 Number of ways to write n = x + y with 0 < x <= y such that lcm(x, y) + 1 is prime.

Table of values

List of values

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

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

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