A281977 - cp's OEIS frontend

A281977 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 -7x - 8y + 8z + 16w are squares.

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

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

cp's OEIS Frontend

A281977 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 -7x - 8y + 8z + 16w are squares.

Table of values

List of values

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

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

cp's OEIS Frontend

A281977 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 -7*x - 8*y + 8*z + 16*w are squares.

Table of values

List of values

A281977 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 -7x - 8y + 8z + 16w are squares.

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