A281945 - cp's OEIS frontend

A281945 Number of ways to write n as x^2 + y^2 + z^2 + w^2 with x,y,z,w nonnegative integers such that both x and x + y - z are powers of two (including 2^0 = 1).

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

[1, 2, 2, 2, 3, 4, 3, 2, 4, 6, 2, 3, 4, 4, 4, 2, 4, 8, 5, 4, 4, 5, 4, 4, 6, 7, 5, 5, 4, 7, 4, 2, 8, 9, 5, 4, 6, 5, 5, 6, 5, 10, 5, 3, 8, 7, 3, 3, 8, 8, 8, 6, 2, 11, 8, 4, 5, 9, 4, 5, 7, 5, 6, 2, 9, 11, 10, 5, 6, 12, 3, 8, 9, 6, 9, 6, 4, 8, 4, 4]

cp's OEIS Frontend

A281945 Number of ways to write n as x^2 + y^2 + z^2 + w^2 with x,y,z,w nonnegative integers such that both x and x + y - z are powers of two (including 2^0 = 1).

Table of values

List of values

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

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

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