A231633 - cp's OEIS frontend

A231633 Number of ways to write n = x + y (x, y > 0) with x^2 * y - 1 prime.

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

[0, 0, 1, 2, 3, 1, 3, 2, 5, 2, 4, 2, 7, 2, 5, 3, 5, 3, 10, 4, 5, 3, 8, 3, 14, 6, 5, 4, 11, 5, 11, 3, 11, 9, 4, 5, 10, 5, 11, 9, 12, 3, 19, 7, 11, 6, 12, 9, 11, 7, 17, 7, 13, 5, 22, 3, 3, 15, 16, 5, 25, 4, 9, 11, 13, 5, 19, 6, 22, 6, 11, 6, 39, 6, 24, 7, 7, 6, 25, 8, 21, 11, 24, 7, 31, 7, 19, 11, 33, 10, 14, 8, 15, 27, 18, 9, 21, 4, 27, 9]

cp's OEIS Frontend

A231633 Number of ways to write n = x + y (x, y > 0) with x^2 * y - 1 prime.

Table of values

List of values

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

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

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