A262436 - cp's OEIS frontend

A262436 Number of ways to represent 2n - 1 as p^2 + q^2 + r with p, q, and r prime, and p >= q.

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

[0, 0, 0, 0, 0, 1, 1, 2, 0, 1, 2, 1, 2, 1, 1, 3, 0, 1, 3, 2, 2, 0, 2, 2, 2, 2, 2, 4, 2, 1, 4, 3, 3, 2, 3, 3, 1, 3, 4, 4, 5, 0, 2, 5, 2, 4, 3, 2, 4, 1, 4, 3, 5, 2, 3, 5, 1, 4, 6, 2, 5, 2, 2, 4, 3, 3, 3, 5, 3, 3, 5, 2, 4, 6, 3, 3, 4, 2, 6, 6, 3, 3, 5, 3, 3, 6, 3]

cp's OEIS Frontend

A262436 Number of ways to represent 2n - 1 as p^2 + q^2 + r with p, q, and r prime, and p >= q.

Table of values

List of values

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

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

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