A231516 - cp's OEIS frontend

A231516 Number of ways to write n = x + y with 0 < x <= y such that x!*y + 1 is prime.

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

[0, 1, 1, 1, 2, 1, 2, 3, 1, 3, 2, 1, 3, 3, 3, 4, 3, 3, 2, 5, 4, 2, 6, 4, 3, 4, 2, 4, 8, 4, 5, 4, 7, 5, 6, 5, 5, 7, 4, 7, 7, 4, 10, 5, 3, 6, 8, 7, 7, 7, 7, 5, 8, 5, 5, 8, 4, 6, 8, 4, 7, 3, 7, 5, 6, 6, 5, 3, 9, 5, 12, 2, 10, 4, 4, 7, 7, 8, 7, 8, 7, 10, 8, 5, 4, 7, 12, 9, 6, 6, 6, 7, 3, 12, 5, 7, 8, 10, 8, 6]

cp's OEIS Frontend

A231516 Number of ways to write n = x + y with 0 < x <= y such that 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	2
8	3
9	1
10	3
11	2
12	1
13	3
14	3
15	3
16	4
17	3
18	3
19	2
20	5
21	4
22	2
23	6
24	4
25	3
26	4
27	2
28	4
29	8
30	4
31	5
32	4
33	7
34	5
35	6
36	5
37	5
38	7
39	4
40	7
41	7
42	4
43	10
44	5
45	3
46	6
47	8
48	7
49	7
50	7
51	7
52	5
53	8
54	5
55	5
56	8
57	4
58	6
59	8
60	4
61	7
62	3
63	7
64	5
65	6
66	6
67	5
68	3
69	9
70	5
71	12
72	2
73	10
74	4
75	4
76	7
77	7
78	8
79	7
80	8
81	7
82	10
83	8
84	5
85	4
86	7
87	12
88	9
89	6
90	6
91	6
92	7
93	3
94	12
95	5
96	7
97	8
98	10
99	8
100	6

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

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