A036468 - cp's OEIS frontend

A036468 Number of ways to represent 2n+1 as a+b with 0 < a < b and a^2 + b^2 prime.

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

[1, 2, 2, 2, 3, 3, 4, 4, 4, 3, 4, 8, 4, 6, 5, 4, 9, 8, 6, 9, 7, 7, 7, 5, 7, 9, 14, 8, 9, 11, 7, 17, 11, 10, 9, 11, 9, 8, 13, 9, 15, 20, 11, 14, 13, 8, 18, 14, 10, 18, 16, 10, 17, 16, 13, 20, 20, 13, 14, 17, 12, 23, 18, 14, 22, 15, 17, 18, 21, 12, 19, 29, 16, 23, 21, 14, 27, 24]

cp's OEIS Frontend

A036468 Number of ways to represent 2n+1 as a+b with 0 < a < b and a^2 + b^2 prime.

Table of values

List of values

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

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

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