A299794 - cp's OEIS frontend

A299794 Number of ways to write n^2 as x^2 + y^2 + z^2 + w^2 with x >= y >= 0 <= z <= w such that x or 2y is a power of 4 (including 4^0 = 1) and x + 15y is also a power of 4.

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

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

cp's OEIS Frontend

A299794 Number of ways to write n^2 as x^2 + y^2 + z^2 + w^2 with x >= y >= 0 <= z <= w such that x or 2y is a power of 4 (including 4^0 = 1) and x + 15y is also a power of 4.

Table of values

List of values

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

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

cp's OEIS Frontend

A299794 Number of ways to write n^2 as x^2 + y^2 + z^2 + w^2 with x >= y >= 0 <= z <= w such that x or 2*y is a power of 4 (including 4^0 = 1) and x + 15*y is also a power of 4.

Table of values

List of values

A299794 Number of ways to write n^2 as x^2 + y^2 + z^2 + w^2 with x >= y >= 0 <= z <= w such that x or 2y is a power of 4 (including 4^0 = 1) and x + 15y is also a power of 4.

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