A300219 - cp's OEIS frontend

A300219 Number of ways to write n^2 as x^2 + y^2 + z^2 + w^2 with x,y,z,w nonnegative integers and z <= w such that both x and 4x - 3y are powers of 4 (including 4^0 = 1).

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

[1, 1, 1, 1, 1, 3, 2, 1, 5, 2, 2, 1, 3, 3, 1, 1, 2, 2, 2, 1, 8, 3, 2, 3, 4, 3, 4, 2, 8, 5, 4, 1, 7, 6, 4, 5, 1, 3, 6, 2, 9, 6, 3, 2, 8, 4, 2, 1, 5, 3, 7, 3, 4, 6, 3, 3, 7, 4, 5, 1, 3, 5, 3, 1, 2, 9, 4, 2, 11, 3, 6, 2, 6, 7, 3, 2, 4, 5, 4, 1]

cp's OEIS Frontend

A300219 Number of ways to write n^2 as x^2 + y^2 + z^2 + w^2 with x,y,z,w nonnegative integers and z <= w such that both x and 4x - 3y are powers of 4 (including 4^0 = 1).

Table of values

List of values

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

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

cp's OEIS Frontend

A300219 Number of ways to write n^2 as x^2 + y^2 + z^2 + w^2 with x,y,z,w nonnegative integers and z <= w such that both x and 4*x - 3*y are powers of 4 (including 4^0 = 1).

Table of values

List of values

A300219 Number of ways to write n^2 as x^2 + y^2 + z^2 + w^2 with x,y,z,w nonnegative integers and z <= w such that both x and 4x - 3y are powers of 4 (including 4^0 = 1).

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