A218656 - cp's OEIS frontend

A218656 Number of ways to write 2n+1 as x+y with 0 < x < y and x^4 + y^4 prime.

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

[1, 2, 3, 2, 3, 3, 1, 5, 4, 4, 4, 5, 4, 7, 6, 5, 3, 10, 4, 9, 8, 4, 9, 6, 7, 11, 7, 5, 11, 9, 9, 9, 11, 4, 14, 14, 9, 8, 9, 7, 11, 8, 12, 12, 10, 9, 11, 17, 10, 12, 16, 7, 13, 14, 8, 15, 9, 11, 23, 16, 9, 17, 23, 8, 15, 15, 11, 21, 18, 12, 19, 14, 15, 19, 21, 17, 16, 23, 13, 21, 20, 17, 29]

cp's OEIS Frontend

A218656 Number of ways to write 2n+1 as x+y with 0 < x < y and x^4 + y^4 prime.

Table of values

List of values

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

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

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