A228430 - cp's OEIS frontend

A228430 Number of ways to write n = x + y (x, y > 0) with x^4 + y*(y+1)/2 prime.

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

[0, 1, 1, 2, 2, 0, 2, 3, 2, 3, 2, 3, 4, 1, 2, 1, 4, 3, 1, 1, 6, 4, 2, 4, 4, 4, 1, 5, 3, 5, 6, 4, 6, 3, 5, 5, 6, 3, 3, 5, 5, 5, 9, 3, 3, 11, 6, 7, 4, 8, 7, 12, 7, 5, 10, 4, 3, 8, 8, 3, 11, 6, 5, 10, 4, 6, 14, 6, 3, 9, 3, 12, 12, 9, 3, 11, 6, 10, 15, 7, 7, 8, 3, 6, 11, 8, 11, 10, 7, 3, 11, 10, 7, 11, 4, 6, 13, 11, 9, 8]

cp's OEIS Frontend

A228430 Number of ways to write n = x + y (x, y > 0) with x^4 + y*(y+1)/2 prime.

Table of values

List of values

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

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

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