A282863 - cp's OEIS frontend

A282863 Number of ways to write n as x^2 + y^2 + z^2 + w^2 with x,y,z,w nonnegative integers such that 72*x^3 + (y-z)^3 is an even square.

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

[1, 1, 1, 1, 2, 2, 3, 1, 2, 3, 1, 2, 3, 3, 2, 2, 3, 3, 2, 2, 4, 3, 5, 2, 1, 3, 2, 4, 2, 3, 4, 2, 2, 3, 1, 3, 5, 3, 4, 1, 3, 4, 2, 2, 5, 2, 1, 3, 2, 3, 1, 4, 3, 2, 6, 3, 1, 4, 3, 3, 2, 4, 6, 1, 2, 6, 3, 3, 6, 3, 6, 2, 5, 3, 1, 6, 7, 5, 2, 4, 5]

cp's OEIS Frontend

A282863 Number of ways to write n as x^2 + y^2 + z^2 + w^2 with x,y,z,w nonnegative integers such that 72*x^3 + (y-z)^3 is an even square.

Table of values

List of values

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

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

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