A283239 - cp's OEIS frontend

A283239 Number of ways to write n as x^2 + y^2 + z(3z-1)/2 with x,y,z integers such that x + 2*y is a square.

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

[1, 2, 3, 2, 2, 5, 5, 5, 1, 2, 4, 2, 5, 3, 3, 4, 3, 7, 5, 3, 8, 3, 5, 3, 2, 6, 3, 7, 5, 3, 4, 7, 5, 3, 4, 6, 5, 3, 3, 7, 5, 5, 5, 1, 6, 7, 6, 4, 3, 2, 5, 5, 9, 6, 3, 7, 5, 7, 5, 4, 8, 5, 6, 4, 6, 5, 5, 8, 5, 6, 6, 7, 5, 5, 5, 7, 5, 6, 2, 4, 12]

cp's OEIS Frontend

A283239 Number of ways to write n as x^2 + y^2 + z(3z-1)/2 with x,y,z integers such that x + 2*y is a square.

Table of values

List of values

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

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

cp's OEIS Frontend

A283239 Number of ways to write n as x^2 + y^2 + z*(3*z-1)/2 with x,y,z integers such that x + 2*y is a square.

Table of values

List of values

A283239 Number of ways to write n as x^2 + y^2 + z(3z-1)/2 with x,y,z integers such that x + 2*y is a square.

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