A283170 - cp's OEIS frontend

A283170 Number of ways to write n as x^2 + y^2 + z^2 + w^2 with x + 2y and z + 2w both squares, where x and w are nonnegative integers, and y and z are integers.

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

[1, 2, 2, 1, 2, 6, 5, 2, 1, 4, 5, 1, 1, 2, 3, 2, 2, 6, 9, 3, 5, 8, 7, 6, 2, 4, 2, 2, 1, 5, 7, 6, 2, 8, 10, 3, 5, 5, 4, 4, 1, 1, 8, 1, 2, 6, 7, 4, 1, 7, 12, 3, 5, 5, 7, 10, 2, 7, 9, 1, 2, 8, 8, 12, 2, 11, 13, 2, 7, 11, 9, 8, 3, 4, 10, 3, 2, 6, 6, 10, 6]

cp's OEIS Frontend

A283170 Number of ways to write n as x^2 + y^2 + z^2 + w^2 with x + 2y and z + 2w both squares, where x and w are nonnegative integers, and y and z are integers.

Table of values

List of values

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

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

cp's OEIS Frontend

A283170 Number of ways to write n as x^2 + y^2 + z^2 + w^2 with x + 2*y and z + 2*w both squares, where x and w are nonnegative integers, and y and z are integers.

Table of values

List of values

A283170 Number of ways to write n as x^2 + y^2 + z^2 + w^2 with x + 2y and z + 2w both squares, where x and w are nonnegative integers, and y and z are integers.

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