A270966 - cp's OEIS frontend

A270966 Number of ways to write n as x^2 + y^2 + z*(3z+1)/2, where x, y and z are integers with 0 <= x <= y such that x or y has the form p-1 with p prime.

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

[1, 2, 2, 2, 2, 3, 2, 2, 3, 3, 2, 2, 3, 2, 3, 3, 5, 3, 2, 4, 2, 3, 3, 2, 4, 3, 5, 4, 2, 4, 4, 5, 2, 3, 2, 4, 5, 4, 5, 3, 6, 6, 4, 4, 4, 3, 4, 5, 1, 3, 5, 8, 5, 3, 6, 3, 4, 4, 4, 4, 4, 5, 3, 3, 6, 5, 8, 4, 2, 4]

cp's OEIS Frontend

A270966 Number of ways to write n as x^2 + y^2 + z*(3z+1)/2, where x, y and z are integers with 0 <= x <= y such that x or y has the form p-1 with p prime.

Table of values

List of values

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

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

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